{"title":"4 Channel Amplifiers","description":null,"products":[{"product_id":"jvc-ks-dr1004d-400-watt-4-channel-bridgeable-amplifier-for-car-marine-and-rzr-atv-utv-cart-motorsports","title":"JVC KS-DR1004D 4-Channel Compact Class-D Amplifier","description":"\u003cp\u003eThe JVC KS-DR1004D is a compact four-channel Class-D amplifier designed to add dedicated power to a car, motorcycle, boat, UTV, or other motorsports audio system. It provides four amplified channels for speakers or can be bridged into two higher-output channels. Its small chassis helps solve installation-space limitations common in compact vehicles and powersports applications.\u003c\/p\u003e\u003cp\u003eAt 14.4 volts, the KS-DR1004D delivers 45 watts RMS to each of four channels at 4 ohms across 20 Hz to 20 kHz. It can also be configured for 90 watts RMS x 2 in bridged operation with 4-ohm loads. This makes it suitable for powering full-range speakers in a four-channel setup or for a smaller two-channel-plus-subwoofer system.\u003c\/p\u003e\u003cp\u003eThe amplifier supports both RCA low-level inputs and speaker-level inputs, allowing it to work with aftermarket receivers as well as compatible factory-installed head units. Signal-sensing auto power control is available when using the speaker-level input. Independent A-channel and B-channel input, sensitivity, and filter controls support system-specific adjustment.\u003c\/p\u003e\u003cp\u003eVariable high-pass and low-pass filters can be adjusted from 50 Hz to 200 Hz, helping direct appropriate frequencies to full-range speakers or a subwoofer. The selectable filtering can also be turned off for full-band operation. A 98 dB signal-to-noise ratio and separated preamplifier and power-amplifier circuit boards are engineered to help reduce unwanted radiation noise.\u003c\/p\u003e\u003cp\u003eFor outdoor-oriented applications, the main printed circuit boards use conformal coating for added protection from moisture, condensation, and airborne contaminants such as salt spray. A large low-pass-filter coil supports stable signal handling at higher listening levels. With its compact 145 x 45 x 99 mm footprint, the KS-DR1004D is a practical amplifier upgrade where mounting room is limited.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Class-D Design:\u003c\/strong\u003e Powers up to four speakers from a compact, efficient amplifier chassis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridgeable Output:\u003c\/strong\u003e Configures as two channels at 90 watts RMS each into 4 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Crossovers:\u003c\/strong\u003e Adjustable 50-200 Hz HPF and LPF settings tailor speaker frequency range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Level Input:\u003c\/strong\u003e Connects to compatible factory speaker outputs without RCA preouts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal-Sensing Turn-On:\u003c\/strong\u003e Supports automatic power activation through the high-level input.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConformal-Coated PCBs:\u003c\/strong\u003e Adds protection against moisture, condensation, and airborne contaminants.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe KS-DR1004D uses a compact chassis, conformal-coated main circuit boards, and separated preamplifier and power-amplifier circuit boards. Its control panel includes separate A-channel and B-channel filter-frequency, filter-mode, and input-sensitivity adjustments. A protective cover is supplied for the control panel after setup.\u003c\/p\u003e\u003cp\u003eInstall the amplifier securely in a dry location with adequate ventilation and clearance for heat dissipation; it should not be mounted under carpet or where it can interfere with driving or safety equipment. Use a 12-volt negative-ground electrical system, connect the ground lead to suitable chassis ground, and place a protective fuse near the battery. The amplifier supports RCA-input installations or speaker-level connections, with 2-ohm minimum stereo loads and 4-ohm minimum bridged loads.\u003c\/p\u003e","brand":"KENWOOD","offers":[{"title":"Default Title","offer_id":43877155143871,"sku":"046838079245","price":116.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/pixelcut-export_a1e7912a-ffe2-415d-9907-58a9aca99f4a.png?v=1736890842"},{"product_id":"car-amplifiers-gravity-audio-wz1000-4-warzone-1000w-4-channels-class-a-b-amp-2-4-ohm-stable-with-remote-sub-control","title":"Gravity Audio WZ1000.4 Warzone 4-Channel Class A\/B Amplifier","description":"\u003cp\u003eThe Gravity Audio WZ1000.4 Warzone is a four-channel car amplifier designed to add external amplification to compatible vehicle audio systems. Its Class A\/B design supports a broad range of speaker-upgrade layouts while operating at 2- or 4-ohm loads. It is intended for listeners who need independent amplification for front and rear speakers or other four-channel system configurations.\u003c\/p\u003e\u003cp\u003eWith a published maximum output of 1000 watts, the WZ1000.4 is built to provide added power beyond a typical head unit's internal amplifier. The amplifier covers a 20 Hz to 20 kHz frequency response range for full-range audio applications. Its signal-to-noise ratio is rated above 80 dB, while total harmonic distortion is specified below 0.5%.\u003c\/p\u003e\u003cp\u003eAdjustable crossover controls help tailor the amplifier to the speakers and system role selected during installation. The variable high-pass filter adjusts from 50 Hz to 1.2 kHz, while the low-pass filter adjusts from 50 Hz to 500 Hz. A variable bass boost control provides adjustment from 0 to 12 dB.\u003c\/p\u003e\u003cp\u003eThe WZ1000.4 includes both high-level and low-level input options, allowing it to work with many factory or aftermarket source-unit setups. Low-level RCA connections can be used with a head unit that has preamp outputs, while high-level inputs offer an option for systems using speaker-level outputs. A remote bass control is included for accessible bass-level adjustment from the cabin.\u003c\/p\u003e\u003cp\u003eIts compact published dimensions of 8.8 by 8.3 by 2.5 inches can simplify placement in many vehicle installations. The amplifier can serve as the main power stage for a four-speaker upgrade or as part of a more customized system using its crossover controls. Correct impedance matching, secure power wiring, and careful gain setup are important for dependable operation.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Class A\/B Design:\u003c\/strong\u003e Provides four amplified channels for speaker-system upgrades.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2- and 4-Ohm Stability:\u003c\/strong\u003e Supports compatible speaker loads at either published impedance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1000W Maximum Power:\u003c\/strong\u003e Supplies added amplification for multi-speaker vehicle audio systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Crossovers:\u003c\/strong\u003e HPF and LPF adjustments help match amplifier output to speakers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBass Boost Control:\u003c\/strong\u003e Offers adjustable low-frequency emphasis from 0 to 12 dB.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh- and Low-Level Inputs:\u003c\/strong\u003e Accommodates speaker-level or RCA signal connections.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe WZ1000.4 uses a compact amplifier format measuring 223.5 mm long, 211 mm wide, and 64.5 mm high. Its published control set includes gain and crossover adjustments, high- and low-level inputs, speaker outputs, power connections, and a remote bass-control connection. Specific chassis material and fuse information are not published in the confirmed product specifications.\u003c\/p\u003e\u003cp\u003eMount the amplifier securely in a dry location with ventilation and room for wiring connections. Use speakers wired within the amplifier's stated 2- or 4-ohm operating range, and select high-level or RCA low-level inputs to suit the source unit. Set crossover points and gain conservatively during setup, then use the included remote bass control for convenient level adjustments.\u003c\/p\u003e","brand":"WARZONE","offers":[{"title":"Default Title","offer_id":43913875259583,"sku":"704129641990","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/71AJbAyxrzL.jpg?v=1734733596"},{"product_id":"warzone-wc1200-4d-4-channel-class-d-amplifier-1200w-rms-power-4-ohms-bridgeable-lpf-hpf-filters-clip-led-indicator-for-pro-car-audio","title":"WARZONE WC1200.4D 4-Channel Class D Car Amplifier","description":"\u003cp\u003eThe WARZONE WC1200.4D is a four-channel Class D car audio amplifier for upgrading speaker systems that need substantially more power than a factory radio can provide. It is designed to drive multiple full-range speaker channels while keeping installation space in mind. The compact chassis can suit systems where available mounting room is limited.\u003c\/p\u003e\u003cp\u003eAt a 4-ohm load, the WC1200.4D is rated at 300 watts RMS per channel across four channels. It is also rated at 420 watts RMS per channel at 2 ohms, giving installers a higher-output option when using compatible speakers. For bridged applications, it is rated at 700 watts RMS per channel across two channels at 4 ohms.\u003c\/p\u003e\u003cp\u003eAdjustable high-pass and low-pass filters provide frequency-management flexibility from 40 Hz to 4 kHz. This allows the amplifier to be configured for different speaker roles, such as protecting smaller speakers from deep bass or limiting a channel to lower-frequency duties. The published 20 Hz to 20 kHz frequency-response range supports broad-band car audio use.\u003c\/p\u003e\u003cp\u003eA clip LED indicator provides a visual reference when setting system levels. Used during gain adjustment, this feature can help identify clipping conditions so the installer can reduce the input level as needed. The specified signal-to-noise ratio is 93 dB.\u003c\/p\u003e\u003cp\u003eThe WC1200.4D fits naturally into a system built around upgraded door speakers, component speakers, or a mixed multi-speaker layout. Its four amplified channels allow separate channels for front and rear speakers, while its bridging capability supports alternative two-channel higher-power configurations. Select speakers and wiring that are appropriate for the intended impedance load and power requirements.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Class D Design:\u003c\/strong\u003e Powers four speaker channels from one compact amplifier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e300W RMS at 4 Ohms:\u003c\/strong\u003e Delivers its rated four-channel output into 4-ohm loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-Ohm Power Rating:\u003c\/strong\u003e Rated for 420W RMS per channel at 2 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridged Output:\u003c\/strong\u003e Provides two 700W RMS channels at 4 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable Crossovers:\u003c\/strong\u003e HPF and LPF ranges run from 40 Hz to 4 kHz.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClip LED Indicator:\u003c\/strong\u003e Gives a visual cue during system-level adjustment.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe WC1200.4D uses a compact amplifier chassis measuring 318.5 x 150 x 50 mm. Its published dimensions correspond to approximately 12.54 x 5.91 x 1.97 inches, helping it fit in many under-seat, trunk, or cargo-area installations. The manufacturer specification identifies the compact form factor but does not publish a chassis-material specification.\u003c\/p\u003e\u003cp\u003eMount the amplifier securely in a location with suitable clearance and follow accepted vehicle-audio wiring practices. Configure the crossover controls to match the speakers being powered, and use the clip LED as a reference when setting levels. For bridged use, follow the documented 4-ohm bridged rating and verify speaker impedance before installation.\u003c\/p\u003e","brand":"WARZONE","offers":[{"title":"Default Title","offer_id":43915334451391,"sku":"783501162544","price":179.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/pixelcut-export_71f3054a-f610-4f0a-8f19-5c16fa0025cc.png?v=1734555307"},{"product_id":"gravity-audio-wc600-4d-warzone-4-channel-class-d-amplifier-600w-max-power-4-ohms-bridgeable-lpf-hpf-filters-bass-boost-clip-led-indicator-for-pro-car-audio","title":"Gravity Audio WC600-4D 4-Channel Class D Amplifier","description":"\u003cp\u003eThe Gravity Audio WC600-4D Warzone is a compact four-channel car audio amplifier designed to add dedicated amplification to a speaker system. Its Class D design supports efficient operation in installations where available space and heat management matter. The amplifier is rated for up to 600 watts of maximum power.\u003c\/p\u003e\u003cp\u003eThis model is intended for vehicle owners upgrading factory or aftermarket speaker systems with an external amplifier. Four channels allow it to be used across front and rear speakers in a full-range setup. Its bridgeable configuration also provides flexibility for systems that need fewer amplified channels with a different channel arrangement.\u003c\/p\u003e\u003cp\u003eThe WC600-4D includes low-pass and high-pass filters for setting frequency ranges appropriate to the speakers being powered. These controls help separate bass and full-range duties within a system. A bass-boost function is also provided for users who want additional low-frequency emphasis.\u003c\/p\u003e\u003cp\u003eClass D amplification is used to provide a space-conscious, efficient platform for a vehicle audio installation. The compact enclosure can suit installations with limited mounting room, while the clip LED indicator provides a visual cue when the amplifier is being driven into clipping. This helps users make level adjustments while setting up the system.\u003c\/p\u003e\u003cp\u003eThe amplifier is listed as stable with 1-, 2-, and 4-ohm speaker configurations and is bridgeable for added system-planning flexibility. It includes a remote subwoofer control for convenient adjustment from the cabin. The WC600-4D can be considered for multi-speaker upgrades when its impedance and power requirements are matched carefully to the connected speakers.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Design:\u003c\/strong\u003e Supports amplification for front and rear speakers from one compact chassis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass D Topology:\u003c\/strong\u003e Provides an efficient amplification platform with reduced heat generation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridgeable Channels:\u003c\/strong\u003e Allows compatible channel pairs to be combined for alternate system layouts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLPF and HPF Controls:\u003c\/strong\u003e Helps tailor the frequency range sent to connected speakers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBass Boost:\u003c\/strong\u003e Adds adjustable low-frequency emphasis when desired in the system setup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClip LED Indicator:\u003c\/strong\u003e Provides a visual warning when the amplifier approaches clipping.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe WC600-4D uses a compact, durable amplifier chassis intended for vehicle installation. Its Class D architecture is designed for efficient operation, and the manufacturer-facing listing identifies a space-saving form factor. Chassis material is not specified in the available product information.\u003c\/p\u003e\u003cp\u003eMount the amplifier on a secure surface with airflow around the unit and away from moisture, moving parts, and excessive heat. Confirm the planned speaker impedance and bridged-channel configuration before wiring, and use the supplied remote subwoofer control where applicable. Professional installation is recommended when integrating the amplifier with a vehicle electrical system and existing audio equipment.\u003c\/p\u003e","brand":"WARZONE","offers":[{"title":"Default Title","offer_id":43915339530431,"sku":"783501162568","price":131.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/pixelcut-export_c323d7b9-2fe1-4826-8b0a-7c9e9498b04c.png?v=1734555668"},{"product_id":"gravity-wc320-4d","title":"Gravity Warzone WC320-4D 4-Channel Class D Amplifier","description":"\u003cp\u003eThe Gravity Warzone WC320-4D is a compact four-channel Class D car amplifier designed to add amplified power and system flexibility to a vehicle audio setup. It is intended for listeners upgrading factory-level amplification or building a multi-speaker system with separate channel control. Its four-channel layout supports use with full-range speakers and may also be configured for bridged applications.\u003c\/p\u003e\u003cp\u003eWith a stated 320 watts of true RMS power, the WC320-4D is positioned for clean, controlled amplification in compact car audio installations. The Class D platform is designed for efficient operation, helping limit heat buildup during extended listening. This makes it suitable for installations where available mounting space and electrical efficiency are important considerations.\u003c\/p\u003e\u003cp\u003eThe amplifier is described as stable with 1-, 2-, and 4-ohm speaker configurations, giving installers flexibility when matching compatible speakers and wiring layouts. Its bridgeable design can combine channel pairs when a system calls for increased output from fewer channels. Confirm the final speaker impedance and amplifier wiring configuration before installation.\u003c\/p\u003e\u003cp\u003eA remote subwoofer control is included for convenient bass-level adjustment from the driver's seat. This can be useful in systems where listening preferences change between music styles or source material. The control is intended to provide accessible adjustment without requiring changes at the amplifier.\u003c\/p\u003e\u003cp\u003eThe WC320-4D fits naturally into a staged audio upgrade, whether it is powering four speakers or serving as part of a broader amplified system. Its compact format can help when mounting locations are limited, while the multi-channel design allows for different system layouts. Professional installation or careful adherence to the amplifier's wiring requirements is recommended for reliable operation.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Configuration:\u003c\/strong\u003e Provides separate amplified channels for compatible multi-speaker systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass D Operation:\u003c\/strong\u003e Supports efficient power delivery with reduced heat generation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e320W True RMS Rating:\u003c\/strong\u003e Delivers the stated continuous-power capability for the amplifier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1-, 2-, and 4-Ohm Stability:\u003c\/strong\u003e Supports compatible speaker-load configurations at multiple impedances.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridgeable Channel Layout:\u003c\/strong\u003e Allows compatible channel pairs to be combined when needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemote Subwoofer Control:\u003c\/strong\u003e Adds convenient bass-level adjustment from the listening position.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe WC320-4D uses a compact Class D amplifier format intended to simplify placement in space-conscious vehicle installations. Its design is described as durable, with circuitry intended for dependable daily-use performance. The small footprint can make it easier to integrate into custom or concealed mounting locations.\u003c\/p\u003e\u003cp\u003eUse the amplifier only with speaker loads and wiring arrangements that are compatible with its stated 1-, 2-, or 4-ohm operation. It can be used for four-channel full-range amplification or in a bridged configuration when the system design calls for it. Plan power, ground, signal, speaker, and remote-control wiring before mounting the amplifier, and follow applicable vehicle and amplifier installation guidance.\u003c\/p\u003e","brand":"WARZONE","offers":[{"title":"Default Title","offer_id":43915349098687,"sku":"Gravity WC320.4D","price":98.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/pixelcut-export_2_cf3ec3c4-5932-46af-95a8-c3fad0bcd94e.png?v=1734556559"},{"product_id":"stx-audio-stx1200-4d","title":"STX Audio STX1200.4D 4-Channel Class D Amplifier","description":"\u003cp\u003eThe STX Audio STX1200.4D is a compact four-channel Class D amplifier designed to add dedicated power and tuning flexibility to a car audio system. It provides 60 watts RMS per channel at 4 ohms or 75 watts RMS per channel at 2 ohms. This makes it suited to powering compatible full-range speakers in a four-speaker installation.\u003c\/p\u003e\u003cp\u003eFor systems that need more output on fewer channels, the amplifier can bridge its channels to deliver 140 watts RMS x 2 at 4 ohms. That configuration can support two compatible speakers or subwoofer applications that meet the stated bridged-load requirement. Its four-channel layout gives installers options when planning a speaker-focused upgrade.\u003c\/p\u003e\u003cp\u003eThe STX1200.4D uses a MOSFET circuit design and Class D amplification architecture. Its SMT construction and double-sided PCB are specified to support stable operation in a compact format. The design is intended for vehicle audio systems where available mounting space may be limited.\u003c\/p\u003e\u003cp\u003eAdjustable high-pass and low-pass filters provide useful control over which frequencies are sent to connected speakers. Both filter sections adjust from 35 Hz to 250 Hz, allowing the amplifier to be tailored for full-range speakers or low-frequency duty. This helps match the amplifier's output to the role of each speaker in the system.\u003c\/p\u003e\u003cp\u003eBuilt-in overload protection and thermal protection support safer operation under demanding conditions. The amplifier is rated for a maximum current draw of 26A and lists a signal-to-noise ratio greater than 80 dB with total harmonic distortion below 1%. It is a practical option for a compatible aftermarket head unit or factory-audio integration plan using appropriate signal connections and installation hardware.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Output:\u003c\/strong\u003e Powers up to four compatible speakers from one compact amplifier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e75W RMS at 2 Ohms:\u003c\/strong\u003e Delivers rated per-channel power for compatible 2-ohm speaker loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridgeable Channels:\u003c\/strong\u003e Combines channel pairs for 140W RMS x 2 at 4 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable Crossovers:\u003c\/strong\u003e HPF and LPF controls tune frequencies from 35 Hz to 250 Hz.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMOSFET Circuit Design:\u003c\/strong\u003e Supports efficient amplification and dependable power delivery.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection Circuitry:\u003c\/strong\u003e Includes overload and thermal protection for operation under load.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe STX1200.4D is built around a Class D MOSFET circuit design with SMT components and a double-sided PCB. Its compact amplifier chassis measures 4.6 x 4.8 x 2 inches, helping it fit in installations where a larger amplifier may be difficult to mount. Built-in thermal protection is specified at 176°F.\u003c\/p\u003e\u003cp\u003eMount the amplifier securely in a dry, ventilated location and use correctly sized power, ground, signal, and speaker wiring for the vehicle installation. Use four compatible 2- or 4-ohm speakers for stereo operation, or bridge channel pairs only with compatible 4-ohm loads. Set the HPF or LPF controls from 35 Hz to 250 Hz according to the connected speakers and overall system design.\u003c\/p\u003e","brand":"STX AUDIO","offers":[{"title":"Default Title","offer_id":45609021079743,"sku":"783501162605","price":99.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/a_cfef525b-22db-44ff-963e-3a25bec83a73.jpg?v=1777674619"},{"product_id":"audio360-ad1600-4-4-channel-car-audio-amplifier-1600w-max-power-compact-class-ab-bridgeable-amp-with-dual-25a-fuses-90db-snr-versatile-stereo-or-mono-output","title":"Audio360 AD1600.4 4-Channel Car Audio Amplifier","description":"\u003cp\u003eThe Audio360 AD1600.4 is a four-channel car audio amplifier designed to add externally amplified power to a vehicle speaker system. It can drive front and rear speakers in a conventional four-channel layout or support two bridged output channels for higher-power applications. This makes it suitable for factory-system upgrades and custom audio installations that need flexible channel configuration.\u003c\/p\u003e\u003cp\u003eAt 4 ohms, the amplifier is rated for 60 watts RMS per channel, while its 2-ohm stereo rating is 90 watts RMS per channel. When bridged into 4-ohm loads, it is rated for 180 watts RMS across two channels. These ratings allow the amplifier to be matched with a range of full-range speakers or appropriately configured bridged speaker loads.\u003c\/p\u003e\u003cp\u003eThe AD1600.4 uses a Class AB amplifier design intended for full-range audio reproduction. Its listed 90 dB signal-to-noise ratio supports a low-noise signal path when the system is properly installed and gain-matched. Separate front and rear gain controls allow the input level to be adjusted for the source unit and system layout.\u003c\/p\u003e\u003cp\u003eFor system tuning, each channel pair provides selectable high-pass, low-pass, or full-range crossover operation. This lets installers high-pass smaller door speakers, run full-range speakers without filtering, or use low-pass filtering in a bridged setup where appropriate. RCA inputs for front and rear channels and RCA pass-through outputs support integration with compatible head units and additional amplifiers.\u003c\/p\u003e\u003cp\u003eThe compact chassis measures approximately 11.81 x 8.98 x 2.01 inches, helping it fit in locations with limited mounting space. Dual 25A onboard fuses and power\/protection status indicators support everyday system monitoring. The amplifier is a practical option for users building a four-speaker system or combining amplified speakers with a two-channel bridged configuration.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Output:\u003c\/strong\u003e Powers up to four speakers from one amplifier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridgeable Configuration:\u003c\/strong\u003e Combines channel pairs for two higher-power 4-ohm outputs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass AB Circuitry:\u003c\/strong\u003e Provides full-range amplification for speaker-system upgrades.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelectable Crossovers:\u003c\/strong\u003e Offers HPF, LPF, and full-range modes per channel pair.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRCA Signal Connections:\u003c\/strong\u003e Includes separate front\/rear inputs and pass-through outputs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual 25A Fuses:\u003c\/strong\u003e Provides onboard overcurrent protection for the amplifier.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe AD1600.4 has a compact aluminum-alloy housing with power, ground, remote, and speaker terminals grouped on one end of the chassis. Its input\/control side includes RCA connections, front and rear gain controls, crossover-mode switches, crossover-frequency controls, and power\/protection LEDs. The listed mounting type is freestanding, and mounting hardware is included according to the available product manual.\u003c\/p\u003e\u003cp\u003eInstall the amplifier in a dry, ventilated location away from heat, moisture, and direct sunlight. Use appropriately sized power, ground, remote, RCA, and speaker wiring; available installation guidance generally recommends 8-gauge power and ground wire, with an externally mounted 50A inline fuse near the battery. Connect 4-ohm speakers for bridged operation, set gain from minimum during initial setup, and use the crossover settings to match the speakers connected to each channel pair.\u003c\/p\u003e","brand":"AUDIO360","offers":[{"title":"Default Title","offer_id":45613551845567,"sku":"783501162674","price":89.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/81hQzROV4aL.jpg?v=1777929835"},{"product_id":"gravity-gbr250-4d-true-360-watt-rms-micro-ultra-compact-digital-4-channel-full-range-amplifier-with-rca-stereo-input-perfect-for-motorcycle-rv-atv-car-boat-marine","title":"Gravity GBR250-4D Compact 4-Channel Digital Amplifier","description":"\u003cp\u003eThe Gravity GBR250-4D is a micro ultra-compact, four-channel full-range digital amplifier for adding external power where installation space is limited. It is rated for 360 watts RMS and uses RCA stereo inputs for connection with compatible source units. Its small footprint makes it a practical option for compact mobile-audio installations.\u003c\/p\u003e\u003cp\u003eThis amplifier is designed for stereo front-and-rear speaker systems in cars, motorcycles, RVs, ATVs, boats, and similar applications. Four channels allow it to power separate front and rear speaker pairs from one amplifier. It can also be configured in bridged operation for a two-channel setup when the connected speakers meet the stated load requirement.\u003c\/p\u003e\u003cp\u003eThe GBR250-4D is stable at 2-ohm and 4-ohm loads, providing 90 watts RMS per channel at 2 ohms. In bridged operation, it is rated at 180 watts RMS by two channels at 4 ohms. These published ratings help match the amplifier to compatible speaker wiring and power-handling needs.\u003c\/p\u003e\u003cp\u003eSelectable low-pass, full-range, and high-pass crossover modes provide basic system-tuning flexibility. High-pass filtering can be used for speaker channels, while low-pass filtering supports installations that require a lower-frequency signal path. Full-range mode leaves crossover selection open for systems using external processing or speaker-specific filtering.\u003c\/p\u003e\u003cp\u003eMeasuring 1.5 x 3.25 x 7.5 inches, the GBR250-4D is intended for installations where a conventional full-size amplifier may be difficult to place. It uses a surface-mount installation format and can fit into compact custom audio layouts. RCA stereo input compatibility makes it suitable for systems built around a source unit with RCA preamp outputs.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Design:\u003c\/strong\u003e Powers front and rear speaker channels from one compact amplifier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e360 Watts RMS:\u003c\/strong\u003e Provides the published total continuous power rating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-Ohm Stable:\u003c\/strong\u003e Supports compatible 2-ohm speaker loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridgeable Channels:\u003c\/strong\u003e Enables two-channel operation at 4 ohms bridged.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRCA Stereo Input:\u003c\/strong\u003e Connects with compatible RCA-equipped source units.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelectable Crossovers:\u003c\/strong\u003e Offers LPF, full-range, and HPF operating modes.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe GBR250-4D uses a compact digital amplifier design with a published 1.5 x 3.25 x 7.5-inch size. The available technical information identifies it as a surface-mount amplifier, but does not specify the enclosure material. Its compact form is intended to help accommodate installations with limited available mounting space.\u003c\/p\u003e\u003cp\u003eInstall the amplifier on a secure mounting surface with access for power, ground, speaker wiring, and RCA signal cables. Use the RCA stereo input with a compatible source unit, and select LPF, full-range, or HPF mode to suit the connected channels. Confirm speaker impedance and wiring before use: the amplifier is rated for 90 watts RMS x 4 at 2 ohms or 180 watts RMS x 2 at 4 ohms bridged.\u003c\/p\u003e","brand":"GRAVITY","offers":[{"title":"Default Title","offer_id":45624146624703,"sku":"704129655423","price":99.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/71VTdQj0i1L.jpg?v=1778532488"},{"product_id":"gravity-gr300-4-4-channels-car-audio-stereo-class-ab-amplifier-2-ohm-stable-1200-watts-peak-power-with-led-indicator-including-remote-level-control-bass-knob","title":"Gravity GR300.4 4-Channel Class AB Car Amplifier","description":"\u003cp\u003eThe Gravity GR300.4 is a four-channel Class AB car audio amplifier designed to add dedicated amplification to an upgraded speaker system. It can be used for front and rear door speakers, component speakers, or other full-range drivers in a 12-volt vehicle audio system. With four amplified channels, it offers a practical route beyond factory head-unit power.\u003c\/p\u003e\u003cp\u003eThis amplifier is rated for up to 300 watts per channel at 2 ohms and up to 150 watts per channel at 4 ohms, both specified at 1% THD. Its 2-ohm stereo stability gives installers flexibility when matching compatible speakers to the amplifier. The Class AB design is intended for full-range system applications where controlled, clean output is important.\u003c\/p\u003e\u003cp\u003eVariable high-pass and low-pass crossover controls help tailor the frequency range sent to connected speakers. The high-pass filter adjusts from 80 Hz to 1.2 kHz, while the low-pass filter adjusts from 50 Hz to 250 Hz. A variable bass boost of up to +12 dB at 50 Hz provides an additional tuning option when system design calls for more low-frequency emphasis.\u003c\/p\u003e\u003cp\u003eThe GR300.4 supports line-level and speaker-level inputs, allowing it to work with many aftermarket and factory-source systems. It also supports bridgeable and tri-mode operation for compatible system layouts. An included remote level-control knob provides a convenient way to adjust the assigned bass level from the listening position.\u003c\/p\u003e\u003cp\u003eProtection circuitry helps safeguard the amplifier against overload, thermal, and short-circuit conditions. Soft-start and muting functions are designed to reduce turn-on noise, while status indicators assist with system monitoring. The compact chassis can be integrated into a variety of vehicle installations when mounted with adequate ventilation and secure wiring.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Class AB Design:\u003c\/strong\u003e Powers a full front-and-rear speaker arrangement from one amplifier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-Ohm Stereo Stability:\u003c\/strong\u003e Supports compatible 2-ohm or 4-ohm stereo speaker loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Crossovers:\u003c\/strong\u003e Lets installers direct appropriate frequencies to connected speakers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBass Boost Control:\u003c\/strong\u003e Adds up to +12 dB at 50 Hz.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Input Options:\u003c\/strong\u003e Accepts line-level and speaker-level audio signals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Protection:\u003c\/strong\u003e Helps protect against overload, heat, and short circuits.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe GR300.4 uses a compact amplifier chassis with chrome-plated RCA, power, and speaker terminals. Its Class AB circuit design includes high-current dual discrete drive stages, a MOSFET PWM power supply, soft-start operation, muting, and power\/protection indicators. These features support dependable daily use when the amplifier is installed and configured correctly.\u003c\/p\u003e\u003cp\u003eUse this amplifier in a negative-ground 12-volt vehicle electrical system and mount it securely in a dry, ventilated location. Match speaker wiring to the supported 2-ohm or 4-ohm stereo loads, set crossover points for the speakers being used, and connect either line-level or speaker-level inputs as appropriate for the source unit. The package includes the amplifier, remote bass control, and user manual.\u003c\/p\u003e","brand":"GRAVITY","offers":[{"title":"Default Title","offer_id":45625114689727,"sku":"704129656451","price":94.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/71oOQyJ_FJL.jpg?v=1778538548"},{"product_id":"crunch-pz21530-4d","title":"Crunch PZ21530-4D 1500W 4-Channel Class D Amplifier","description":"\u003cp\u003eThe Crunch PZ21530-4D is a four-channel Class D car audio amplifier designed to add external power and tuning flexibility to an aftermarket or factory-based sound system. It can drive front and rear speakers in a conventional four-channel layout, or it can be configured for bridged operation where appropriate. Its compact chassis helps make it practical for vehicle installations where amplifier space is limited.\u003c\/p\u003e\u003cp\u003eThis amplifier is suited to listeners upgrading factory speaker output, adding power to component speakers, or building a mixed speaker-and-subwoofer system. It accepts low-level RCA signals as well as speaker-level input, allowing integration with source units that do not provide RCA preamp outputs. A full-range RCA output can also pass signal to an additional amplifier.\u003c\/p\u003e\u003cp\u003eOutput is rated at 4 x 375 watts at 2 ohms, 4 x 200 watts at 4 ohms, or 2 x 750 watts bridged at 4 ohms. These configuration options allow the amplifier to support a four-speaker system or a combination of speakers and bridged channels. Proper speaker impedance and wiring configuration are important when selecting an operating mode.\u003c\/p\u003e\u003cp\u003eVariable high-pass and low-pass crossovers provide 12 dB-per-octave filtering from 40 to 400 Hz. This lets an installer remove deep bass from smaller speakers or direct lower frequencies to compatible subwoofer channels. Built-in bass control and adjustable input sensitivity further support system-level tuning.\u003c\/p\u003e\u003cp\u003eThe PZ21530-4D uses Crunch SPEED-FET MOSFET output technology, a MOSFET pulse-width-modulation power supply, and QTD quick thermal dispersion heat management. Nickel-plated brass connections and hex set-screw terminals support secure power, ground, and speaker wiring. LED protection diagnostics provide visual status monitoring for overload and speaker-short protection.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Class D Design:\u003c\/strong\u003e Powers a full speaker system or bridged channel pairs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1500-Watt Maximum Power:\u003c\/strong\u003e Provides power capacity across four amplifier channels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-Ohm Stereo Capability:\u003c\/strong\u003e Delivers up to 375 watts per channel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Electronic Crossovers:\u003c\/strong\u003e Helps match frequency output to connected speakers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRCA And Speaker-Level Inputs:\u003c\/strong\u003e Supports aftermarket and many factory-radio installations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLED Protection Diagnostics:\u003c\/strong\u003e Indicates overload and speaker-short protection status.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe amplifier has a compact black and gray chassis measuring 11.75 by 7 by 3.25 inches. Its design incorporates QTD thermal dispersion, SPEED-FET MOSFET output devices, a MOSFET PWM power supply, and nickel-plated brass connections with hex set-screw terminals. These components are intended to support efficient operation and secure electrical connections.\u003c\/p\u003e\u003cp\u003eMount the amplifier to a solid surface with adequate ventilation and do not mount it upside down. Use 4 AWG power and ground wiring, protect the positive battery cable with the specified external 40-amp fuse within 18 inches of the battery, and use 12 AWG speaker wiring. Set gain and crossover controls after confirming speaker impedance, channel mode, and polarity; professional installation is advisable for complex or bridged systems.\u003c\/p\u003e","brand":"CRUNCH","offers":[{"title":"Default Title","offer_id":45760000098495,"sku":"PZ21530-4D","price":75.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/61sOmUQkvuL.jpg?v=1782105000"},{"product_id":"crunch-dr-1325-4d","title":"Crunch DR-1325.4D 4-Channel Class D Car Amplifier","description":"\u003cp\u003eThe Crunch DR-1325.4D is a compact four-channel car audio amplifier designed to add dedicated amplification to aftermarket speaker systems. Its Class D design supports full-range speaker setups as well as bridged configurations for systems that combine speakers and subwoofers. It is a practical option for vehicle owners who need flexible channel routing from one amplifier.\u003c\/p\u003e\u003cp\u003eThis V-DRIVE amplifier is rated by Crunch at up to 4 x 330 watts at 2 ohms, 4 x 165 watts at 4 ohms, or 2 x 660 watts bridged at 4 ohms. Those configuration choices allow it to run four speakers, two bridged pairs, or a mixed stereo-and-mono arrangement when the connected speakers and wiring are compatible. Its 2-ohm unbridged capability gives installers additional options when selecting speakers.\u003c\/p\u003e\u003cp\u003eAdjustable high-pass and low-pass crossovers operate from 40Hz to 400Hz with a 12dB-per-octave slope. This allows the amplifier to send appropriate frequency ranges to full-range speakers or subwoofers instead of relying only on the source unit for filtering. The onboard electronic crossover controls help tailor a system around the speakers being used.\u003c\/p\u003e\u003cp\u003eCrunch uses proprietary SPEED-FET MOSFET output devices and a PWM power supply in the DR-1325.4D. A QTD aluminum heat sink adds thermal mass to support heat dissipation during operation. The amplifier also includes low-noise preamplifier circuitry and RCA signal inputs for connection to compatible aftermarket source units or processors.\u003c\/p\u003e\u003cp\u003eAn LED VU meter and selectable logo illumination provide visual feedback during setup, while the protection diagnostic indicator monitors overload and speaker-short conditions. RCA output connections can be used to pass signal to a second amplifier for system expansion. With its small 6.85-inch chassis length, the DR-1325.4D can fit installations where mounting space is limited while still providing four-channel flexibility.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Class D Design:\u003c\/strong\u003e Powers four speakers or supports compatible bridged system layouts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Power Configuration:\u003c\/strong\u003e Delivers rated output at 2 ohms, 4 ohms, or bridged 4-ohm loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable 12dB Crossovers:\u003c\/strong\u003e Helps match frequency output to speakers and subwoofers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQTD Aluminum Heat Sink:\u003c\/strong\u003e Adds heat-dissipating mass for sustained amplifier operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLED VU Meter:\u003c\/strong\u003e Provides visual signal-level feedback when setting gain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection Diagnostics:\u003c\/strong\u003e Indicates overload and speaker-short protection status.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe DR-1325.4D uses a black compact chassis with an aluminum QTD heat sink, nickel-plated brass connection terminals, and screw-down connectors. Its selectable logo lighting can be set to constant red, VU meter operation, or off. The amplifier measures 6.85 inches long, 5.83 inches wide, and 2.2 inches high.\u003c\/p\u003e\u003cp\u003eUse 4 AWG power and ground cable with the amplifier's 4 AWG power terminals, and use an external 60A fuse. The installation guide specifies placing the power-cable fuse within 18 inches of the battery and mounting the amplifier securely with adequate ventilation. Connect compatible RCA signal cables, select the crossover mode for each channel pair, and set gain carefully to match the source unit output.\u003c\/p\u003e","brand":"CRUNCH","offers":[{"title":"Default Title","offer_id":45760006750399,"sku":"DR-1325-4D","price":68.43,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/71xE65G7cgL.jpg?v=1782105015"},{"product_id":"crunch-dr-2525-4d","title":"Crunch DR-2525.4D 4-Channel Class D Car Amplifier","description":"\u003cp\u003eThe Crunch DR-2525.4D is a four-channel mobile amplifier designed to add dedicated amplification to an aftermarket or compatible vehicle audio system. It can power four speaker channels or be configured for bridged applications, giving installers flexibility when planning a full-range and subwoofer system. Its Class D design keeps the amplifier compact while supporting high-output system layouts.\u003c\/p\u003e\u003cp\u003eThis amplifier is suited to listeners upgrading factory-level amplification or building a custom multi-speaker setup. Variable high-pass and low-pass filters let each channel pair be tailored for the speakers connected to it. The crossover controls can help protect smaller speakers from low-frequency content or help blend amplified speakers with subwoofers.\u003c\/p\u003e\u003cp\u003eThe DR-2525.4D is rated for up to 2525 watts of maximum power, with output ratings of 320 watts per channel at 4 ohms and 630 watts per channel at 2 ohms. It also supports two bridged channels at 4 ohms, rated at 1260 watts per bridged channel. Use impedance-appropriate speakers and careful gain setting to build a balanced system.\u003c\/p\u003e\u003cp\u003eCrunch equips this V-DRIVE amplifier with proprietary SPEED-FET MOSFET components, a PWM power supply, and a low-noise preamplifier circuit. Its QTD aluminum heat sink is designed to disperse heat during normal operation. The amplifier also includes LED protection diagnostics for overload and speaker-short monitoring.\u003c\/p\u003e\u003cp\u003eInstallation-focused details include RCA inputs, nickel-plated brass terminals, screw-down connections, and an LED VU meter for visual gain adjustment. The selectable logo illumination can operate in constant red, VU-meter, or off modes. For a practical upgrade path, it can serve a four-speaker system, a mixed stereo-and-bridged system, or two bridged speaker\/subwoofer channels.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Class D Design:\u003c\/strong\u003e Powers four speakers or supports multiple bridged system configurations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2525W Maximum Output:\u003c\/strong\u003e Provides high-output capability for custom vehicle audio systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable 12dB Crossovers:\u003c\/strong\u003e Helps match frequency ranges to connected speakers or subwoofers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQTD Aluminum Heat Sink:\u003c\/strong\u003e Aids heat dispersion during normal music playback.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLED VU Meter:\u003c\/strong\u003e Provides visual feedback when setting amplifier gain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelectable Logo Lighting:\u003c\/strong\u003e Choose constant red, VU-meter, or off illumination.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe DR-2525.4D uses a black V-DRIVE chassis with an aluminum QTD heat sink, nickel-plated brass connection terminals, and screw-down connectors. Its compact amplifier chassis is listed at 6.85 x 5.83 x 2.2 inches, while the manufacturer also lists shipping dimensions of 9.65 x 7 x 3.23 inches. LED power\/protection indicators and the VU meter place key status and setup feedback on the amplifier.\u003c\/p\u003e\u003cp\u003eUse 4 AWG cable for the 12V and ground terminals, as specified by Crunch, and protect the power run with the required external 80A fuse. The speaker terminals accept up to 8 AWG wire, and signal input is through RCA connections with 0.2-6V input sensitivity. Mount the amplifier securely in a ventilated location, set crossover mode separately for channel pairs, and set gain with appropriate test equipment rather than relying on the VU meter alone.\u003c\/p\u003e","brand":"CRUNCH","offers":[{"title":"Default Title","offer_id":45760006815935,"sku":"DR-2525-4D","price":75.53,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/71uOshLuLSL.jpg?v=1782105019"},{"product_id":"crunch-gp-1000-4","title":"Crunch GP-1000.4 4-Channel Car Audio Amplifier","description":"\u003cp\u003eThe Crunch GP-1000.4 is a four-channel Class A\/B car audio amplifier designed to add external amplification to a speaker-based system. It provides four channels for front and rear speakers, with the flexibility to bridge channel pairs when a two-channel configuration is preferred. Its manufacturer-stated maximum output is 125 watts by four channels at 4 ohms, 250 watts by four channels at 2 ohms, or 500 watts by two channels bridged at 4 ohms.\u003c\/p\u003e\u003cp\u003eThis amplifier is suited to vehicle owners upgrading beyond head-unit power or integrating amplification with a factory radio. RCA low-level inputs support aftermarket source units, while speaker-level inputs provide an option for systems without RCA outputs. Input sensitivity is adjustable from 0.2 to 9 volts for matching the amplifier to the source signal.\u003c\/p\u003e\u003cp\u003eThe GP-1000.4 uses a Class A\/B topology and a low-noise preamplifier circuit for full-range audio amplification. Its 10 Hz to 22 kHz frequency response supports use with component speakers, coaxial speakers, or appropriately configured subwoofer channels. Variable electronic crossovers help divide frequencies for the speakers connected to each channel pair.\u003c\/p\u003e\u003cp\u003eCrunch equips the amplifier with SPEED-FET MOSFET output devices and a pulse-width-modulated power supply. The aluminum heat sink uses QTD, or Quick Thermal Dispersion, design to help manage operating heat. LED diagnostics provide power and protection status for monitoring overload or speaker-short conditions.\u003c\/p\u003e\u003cp\u003eFor system planning, the amplifier can operate in four-channel stereo, stereo plus bridged mono, dual stereo bridged, or dual bridged mono arrangements. It is stable down to 2 ohms per channel in unbridged use and requires a 4-ohm minimum load when bridged. This makes it a flexible choice for powering a conventional four-speaker system or for combining speaker channels with a bridged channel pair.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Class A\/B Design:\u003c\/strong\u003e Powers front and rear speakers from one amplifier chassis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-Ohm Stereo Stability:\u003c\/strong\u003e Supports compatible 2-ohm loads on individual channels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-Ohm Bridged Operation:\u003c\/strong\u003e Lets each channel pair drive one compatible bridged load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Electronic Crossovers:\u003c\/strong\u003e Helps tailor high-pass or low-pass frequency routing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRCA And Speaker-Level Inputs:\u003c\/strong\u003e Works with aftermarket radios or compatible factory-radio signals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQTD Aluminum Heat Sink:\u003c\/strong\u003e Helps disperse heat during normal amplifier operation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe GP-1000.4 has a black-and-red finish, an aluminum heat sink, nickel-plated brass connection terminals, and screw-down connectors. Its compact listed dimensions are 10 inches long, 8 inches wide, and 2.375 inches high, with a listed weight of 6.25 pounds. LED power and protection indicators are located on the amplifier for status monitoring.\u003c\/p\u003e\u003cp\u003eMount the amplifier securely in a ventilated location and do not install it upside down. The manufacturer specifies 4 AWG power and ground terminals, 12 AWG speaker terminals, and one 30A fuse; the power cable should be fused within 18 inches of the battery. Use RCA inputs when available, or connect the supplied high-level input harness to compatible factory speaker wiring when integrating with an OEM source unit.\u003c\/p\u003e","brand":"CRUNCH","offers":[{"title":"Default Title","offer_id":45760007635135,"sku":"GP-1000-4","price":71.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/61C1xoSFhKL_ba1b3026-4a57-4908-9252-9bc04431ffea.jpg?v=1782105025"},{"product_id":"crunch-gp-1500-4","title":"Crunch GP-1500.4 4-Channel Car Amplifier","description":"\u003cp\u003eThe Crunch GP-1500.4 is a four-channel Class A\/B car audio amplifier designed to add external power and system flexibility to a vehicle sound system. It can drive four speakers in stereo or support bridged channel pairs for higher-power applications. This makes it suitable for upgrading factory or aftermarket speaker systems while retaining control over system configuration.\u003c\/p\u003e\u003cp\u003eWith output ratings of 4 x 185 watts at 4 ohms and 4 x 375 watts at 2 ohms, the GP-1500.4 is built for systems using compatible full-range speakers. It can also bridge into two 4-ohm loads at 750 watts per channel pair. The amplifier supports four-channel stereo, dual stereo bridged, stereo plus bridged mono, and dual bridged mono operating modes.\u003c\/p\u003e\u003cp\u003eThe built-in variable electronic crossover helps tailor the signal sent to connected speakers. Selectable full-range, high-pass, and low-pass modes allow installers to configure channel pairs for component speakers, coaxial speakers, or compatible subwoofer duty. Variable high-pass and low-pass controls cover a 40 to 400 Hz range.\u003c\/p\u003e\u003cp\u003eThe amplifier accepts both RCA low-level and speaker-level inputs, providing connection options for aftermarket receivers and many factory audio systems. Its adjustable 0.2 to 9V input sensitivity range supports level matching to the source unit. A low-noise preamplifier circuit is used ahead of the amplifier section.\u003c\/p\u003e\u003cp\u003eCrunch equips the GP-1500.4 with SPEED-FET MOSFET output components, a pulse-width-modulated power supply, and an aluminum heat sink using Quick Thermal Dispersion technology. Switchable bass boost provides 0, +6, or +12 dB settings. The compact chassis can serve as the power stage for a four-speaker upgrade or a mixed system using stereo speakers and bridged channels.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Design:\u003c\/strong\u003e Powers up to four speakers from one chassis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-Ohm Stable Outputs:\u003c\/strong\u003e Delivers 375 watts per channel at 2 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridged Channel Pairs:\u003c\/strong\u003e Provides two 750-watt outputs into 4 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Electronic Crossover:\u003c\/strong\u003e Select high-pass, low-pass, or full-range operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh- And Low-Level Inputs:\u003c\/strong\u003e Connects with factory or aftermarket source units.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwitchable Bass Boost:\u003c\/strong\u003e Offers 0, +6, and +12 dB settings.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe GP-1500.4 uses a black and red aluminum heat-sink chassis with Class A\/B circuitry. Its power section incorporates a high-energy PWM power supply and SPEED-FET MOSFET components. Nickel-plated brass terminals with screw-down connections provide the amplifier's power and speaker connection points.\u003c\/p\u003e\u003cp\u003eMount the amplifier in a secure, ventilated location away from moisture and excessive heat. Use up to 4 AWG power and ground wire, use speaker wire up to 12 AWG at the amplifier terminals, and protect the power connection with appropriate fusing. Configure each channel pair for full-range, high-pass, or low-pass use, and maintain a 2-ohm minimum load per unbridged channel or a 4-ohm minimum load when bridged.\u003c\/p\u003e","brand":"CRUNCH","offers":[{"title":"Default Title","offer_id":45760008585407,"sku":"GP-1500-4","price":65.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/71JMGioEtNL.jpg?v=1782105027"},{"product_id":"crunch-gp-2000-4","title":"Crunch GP-2000.4 4-Channel Class AB Car Amplifier","description":"\u003cp\u003eThe Crunch GP-2000.4 Ground Pounder is a four-channel car audio amplifier for powering an upgraded speaker system from a factory or aftermarket source unit. It provides four-channel operation for front and rear speakers, with bridged configurations available when a system needs higher output on paired channels. High-level inputs also make it suitable for installations that retain a factory radio without RCA preamp outputs.\u003c\/p\u003e\u003cp\u003eThis Class A\/B amplifier is rated for 4 x 250 watts at 4 ohms or 4 x 500 watts at 2 ohms. For systems that need paired-channel output, it can be configured for 2 x 1,000 watts bridged at 4 ohms. Its selectable operating arrangements support four-channel stereo, dual stereo bridged, stereo plus bridged mono, or dual bridged mono setups.\u003c\/p\u003e\u003cp\u003eThe GP-2000.4 is designed for installers and enthusiasts building a multi-speaker system with adjustable signal shaping. Variable electronic crossovers help direct suitable frequency ranges to connected speakers, while the built-in bass control and selectable bass boost allow system-level adjustment. Input sensitivity is variable from 0.2 to 9 volts to accommodate a range of source-unit signal levels.\u003c\/p\u003e\u003cp\u003eCrunch uses SPEED-FET MOSFET output devices and a high-energy pulse-width-modulated power supply in this amplifier. Its QTD aluminum heat sink is intended to disperse heat during operation, and the low-noise preamplifier circuit supports a clean signal path from the source unit. LED diagnostics provide visual indication for overload and speaker-short protection.\u003c\/p\u003e\u003cp\u003eFor an upgrade path, the GP-2000.4 can run four speakers independently or be bridged into two higher-output channels at the specified 4-ohm load. RCA inputs support conventional aftermarket head-unit connections, while high-level inputs provide an option for OEM integration. An RCA output can also pass signal to a second amplifier when expanding the system.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Design:\u003c\/strong\u003e Powers front and rear speakers from one amplifier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelectable Bridging:\u003c\/strong\u003e Supports two bridged 4-ohm channel pairs when needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Electronic Crossovers:\u003c\/strong\u003e Helps tailor frequency ranges for connected speakers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Level Inputs:\u003c\/strong\u003e Connects to factory radios without RCA outputs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQTD Aluminum Heat Sink:\u003c\/strong\u003e Helps disperse heat during normal operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLED Protection Diagnostics:\u003c\/strong\u003e Indicates overload and speaker-short protection status.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe GP-2000.4 has a black and red chassis with an aluminum QTD heat sink, nickel-plated brass connection terminals, and screw-down connectors. Its compact amplifier dimensions are 11.5 inches long, 8 inches wide, and 2.375 inches high. The design also incorporates SPEED-FET MOSFET output components, a low-noise preamplifier circuit, and a pulse-width-modulated power supply.\u003c\/p\u003e\u003cp\u003eMount the amplifier on a secure surface with adequate ventilation and do not install it upside down. The power and ground terminals accept 4 AWG cable, while speaker terminals accept 12 AWG cable; the manufacturer specifies 30A x 2 fusing. Use RCA inputs with compatible preamp outputs, or use the supplied high-level-input harness with a source unit that lacks RCA outputs, and observe the labeled speaker and bridged-output connections.\u003c\/p\u003e","brand":"CRUNCH","offers":[{"title":"Default Title","offer_id":45760013959359,"sku":"GP-2000-4","price":67.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/61feOZ4WLmL.jpg?v=1782105035"},{"product_id":"crunch-sa-1100-4","title":"Crunch SA-1100.4 4-Channel Class AB Car Amplifier","description":"\u003cp\u003eThe Crunch SA-1100.4 is a four-channel Class AB car amplifier designed to add dedicated amplification to a factory or aftermarket audio system. It can power front and rear speakers from four channels or be configured to bridge channel pairs for higher-output two-channel applications. Its selectable operating modes make it suitable for straightforward speaker upgrades as well as mixed speaker-and-subwoofer system layouts.\u003c\/p\u003e\u003cp\u003eAt its published output ratings, the SA-1100.4 delivers 40 watts per channel into 2 ohms or 30 watts per channel into 4 ohms. When two channel pairs are bridged into 4-ohm loads, it provides 60 watts per bridged channel pair. This flexibility helps match the amplifier to common full-range speaker configurations without requiring separate amplifiers for every setup.\u003c\/p\u003e\u003cp\u003eThe amplifier uses Class AB topology with a pulse-width-modulated power supply and Crunch SPEED-FET MOSFET output-device technology. A low-noise preamplifier circuit and RCA signal connections support clean signal transfer from compatible source units. High-level inputs also allow integration with source units that do not provide RCA preamp outputs.\u003c\/p\u003e\u003cp\u003eBuilt-in crossover controls allow the amplifier to be tuned for full-range speakers, high-pass applications, or low-pass applications. Separate crossover controls for channel pairs 1\/2 and 3\/4 make it possible to configure different speaker roles in the same installation. The selectable bass control provides an additional low-frequency adjustment option when system tuning calls for it.\u003c\/p\u003e\u003cp\u003eThe SA-1100.4 fits naturally into an entry-level or replacement amplifier upgrade path for vehicles needing more control than a head unit's internal amplifier can provide. It includes RCA input and output connections for signal routing to another amplifier, helping support expandable systems. Its combination of stereo, bridged, and mixed-mode operation gives installers multiple ways to allocate its four channels.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Class AB Design:\u003c\/strong\u003e Powers up to four speakers from one chassis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelectable Operating Modes:\u003c\/strong\u003e Supports stereo, bridged, and mixed-channel configurations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Electronic Crossover:\u003c\/strong\u003e Helps direct appropriate frequencies to connected speakers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Level Inputs:\u003c\/strong\u003e Connects with factory radios lacking RCA outputs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRCA Input And Output:\u003c\/strong\u003e Supports low-level signal input and amplifier expansion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection Status Indicators:\u003c\/strong\u003e Lighted diagnostics monitor overload and speaker-short conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe SA-1100.4 uses an aluminum QTD heat sink intended to disperse operating heat, along with nickel-plated brass connection terminals and screw-down connectors. Its Class AB circuit design uses a pulse-width-modulated power supply and SPEED-FET MOSFET output devices. LED diagnostic indicators are provided for overload and speaker-short protection monitoring.\u003c\/p\u003e\u003cp\u003eMount the amplifier securely in a ventilated location and do not install it upside down. It accepts low-level RCA input or high-level speaker input through the supplied harness, with RCA output available for another amplifier. Use the 4 AWG power and ground terminals, 12 AWG speaker terminals, a 30A fuse, and set the input level and crossover controls to suit the connected speakers and source unit.\u003c\/p\u003e","brand":"CRUNCH","offers":[{"title":"Default Title","offer_id":45760015335615,"sku":"SA-1100-4","price":56.43,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/61FzKW6YyrL.jpg?v=1782105037"},{"product_id":"kenwood-kac-d3104","title":"Kenwood KAC-D3104 4-Channel Class D Power Amplifier","description":"\u003cp\u003eThe Kenwood KAC-D3104 is a compact four-channel Class D car audio power amplifier designed to add dedicated amplification to a vehicle sound system. It provides 50 watts RMS to each of four channels at 4 ohms, making it suited to powering upgraded front and rear speakers. Its compact chassis helps address installations where space behind panels, beneath seats, or in a trunk is limited.\u003c\/p\u003e\u003cp\u003eThis amplifier is a practical choice for listeners who want clearer, more controlled output than a typical factory head unit can provide. It supports both RCA line-level input and speaker-level input, allowing it to work with a variety of aftermarket or factory-source systems. Signal-sensing turn-on support can simplify integration when using a speaker-level source.\u003c\/p\u003e\u003cp\u003eThe KAC-D3104 uses Class D amplification and a Power MOS-FET switching power supply in a compact format. Its frequency response extends from 20 Hz to 50 kHz, supporting full-range speaker systems and high-resolution audio playback. Kenwood's Dual Sigma Drive negative-feedback circuit is designed to improve damping and signal accuracy.\u003c\/p\u003e\u003cp\u003eEach A\/B channel pair has selectable variable high-pass or low-pass filtering from 50 Hz to 200 Hz. This flexibility lets the amplifier run full-range speakers with high-pass filtering or support a filtered speaker\/subwoofer configuration when the system design calls for it. Bass boost is available on the B-channel section at 40 Hz, adjustable from 0 dB to +18 dB.\u003c\/p\u003e\u003cp\u003eFor larger system plans, the KAC-D3104 can also be bridged to deliver 150 watts RMS to each of two 4-ohm channels. That makes it adaptable for a two-channel higher-power speaker setup, while its standard four-channel mode is appropriate for front-and-rear speaker upgrades. Proper impedance matching, power wiring, grounding, and gain setup remain important for reliable operation.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Class D Design:\u003c\/strong\u003e Powers four speakers from a compact amplifier chassis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e50W RMS x 4 at 4 Ohms:\u003c\/strong\u003e Delivers dedicated power for full-range speaker upgrades.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-Ohm Load Capability:\u003c\/strong\u003e Produces 75W RMS per channel at 2 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridgeable Channels:\u003c\/strong\u003e Configures as two 150W RMS channels at 4 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable HPF and LPF:\u003c\/strong\u003e Helps match output to speaker system needs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeaker-Level Input:\u003c\/strong\u003e Supports integration with systems lacking RCA outputs.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe KAC-D3104 uses an extruded aluminum heat-sink design and a compact 6-11\/16 by 2-3\/16 by 7-3\/8 inch chassis. Its terminal layout includes M6 screw-type battery and ground terminals plus M4 screw-type speaker output terminals. The design combines four channels of Class D amplification with separate A- and B-channel filter and sensitivity controls.\u003c\/p\u003e\u003cp\u003eInstall the amplifier in a dry, ventilated location with secure mounting and appropriate power, ground, remote-turn-on, signal, and speaker wiring. Use four-channel mode for separate front and rear speakers, or bridge paired channels only with a 4- to 8-ohm bridged load. Set input sensitivity and crossover controls after matching the amplifier to the source unit and connected speakers.\u003c\/p\u003e","brand":"KENWOOD","offers":[{"title":"Default Title","offer_id":45766404931775,"sku":"KAC-D3104","price":126.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/51CSwUyqMrL.jpg?v=1782245927"},{"product_id":"kenwood-kac-m1814","title":"Kenwood KAC-M1814 Compact 4-Channel Marine Digital Amplifier","description":"\u003cp\u003eThe Kenwood KAC-M1814 is a compact four-channel Class D amplifier designed to add clean, controlled power to car, marine, and motorsports audio systems. It is a practical solution for systems that need more output than a receiver's built-in amplifier can provide while conserving installation space. Its small footprint makes it suitable for locations where a conventional full-size amplifier may be difficult to mount.\u003c\/p\u003e\u003cp\u003eWith 45 watts RMS per channel, the KAC-M1814 can power four compatible speakers or be configured in bridged two-channel operation. It supports 2-ohm stereo loads and 4- to 8-ohm bridged loads, allowing it to work with a range of speaker layouts. Variable high-pass and low-pass filters help tailor the signal for full-range speakers or selected system configurations.\u003c\/p\u003e\u003cp\u003eThis amplifier is intended for listeners building a compact upgrade in a vehicle, boat, or powersports application. Speaker-level input with signal-sensing turn-on supports integration with receivers that do not provide dedicated RCA preamp outputs. RCA inputs are also available for use with aftermarket receivers and other line-level sources.\u003c\/p\u003e\u003cp\u003eKenwood uses a Class D digital amplifier platform with a Power MOS-FET switching power supply to keep the chassis compact. Separate preamp and power-amp sections are designed to help reduce radiation noise. Independent A and B channel gain controls and separately adjustable crossover sections provide useful setup flexibility.\u003c\/p\u003e\u003cp\u003eFor outdoor-oriented installations, the KAC-M1814 includes conformal coating to help protect the circuit board from rust and vibration-related exposure. Its covered connectors are designed to help keep out water and dust. The amplifier fits neatly into a system using four speakers, or it can be used bridged for two compatible channels where higher per-channel output is needed.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Class D Amplification:\u003c\/strong\u003e Adds 45 watts RMS to each of four channels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridgeable Output:\u003c\/strong\u003e Supports two-channel bridged operation at compatible 4-ohm loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeaker-Level Input:\u003c\/strong\u003e Connects to systems without RCA preamp outputs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal-Sensing Turn-On:\u003c\/strong\u003e Powers on when an input signal is detected.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Crossovers:\u003c\/strong\u003e Adjustable high-pass and low-pass filtering from 50 to 200 Hz.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConformal-Coated Circuit Board:\u003c\/strong\u003e Helps protect the electronics in marine and motorsports use.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe KAC-M1814 uses a compact aluminum heat-sink chassis with a 145 x 45 x 99 mm enclosure size. Its Class D design, covered connector arrangement, and conformal-coated circuit board suit installations where space and environmental exposure are considerations. The amplifier also uses a Power MOS-FET switching power supply and separate preamp and power-amp sections.\u003c\/p\u003e\u003cp\u003eMount the amplifier in a secure location with appropriate ventilation and connect it to a 12-volt DC vehicle electrical system. It can accept RCA line-level inputs or speaker-level inputs, while its included DC cable and RCA cables support basic installation connections. Set the A and B channel gain and crossover controls to match the connected speakers and chosen system layout.\u003c\/p\u003e","brand":"KENWOOD","offers":[{"title":"Default Title","offer_id":45766405226687,"sku":"KAC-M1814","price":113.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/71FANe4bUgL.jpg?v=1782245931"},{"product_id":"kenwood-kac-m5024bt","title":"Kenwood KAC-M5024BT 4-Channel Bluetooth Marine Amplifier","description":"\u003cp\u003eThe Kenwood KAC-M5024BT is a compact four-channel Class D amplifier designed for marine, powersports, motorcycle, ATV, UTV, and vehicle audio systems. It combines amplification and Bluetooth audio streaming in one weather-resistant component, making it useful where installing a conventional receiver is impractical. With four amplified channels, it can power a full speaker system or be configured for bridged two-channel operation.\u003c\/p\u003e\u003cp\u003eAt 4 ohms, the amplifier delivers 50 watts RMS to each of four channels, with 75 watts RMS per channel available at 2 ohms. Its Class D design provides efficient power delivery in a small chassis measuring under eight inches wide. The adjustable high-pass and low-pass filters help tailor the amplifier for full-range speakers or a mixed speaker-and-subwoofer system.\u003c\/p\u003e\u003cp\u003eBuilt-in Bluetooth lets a compatible phone or media device stream directly to the amplifier without a wired RCA source input. The included wired Bluetooth remote provides source control, volume adjustment, track controls, and access to EQ settings. Bluetooth supports A2DP and AVRCP profiles, plus aptX and AAC audio codecs.\u003c\/p\u003e\u003cp\u003eThe KAC-M5024BT is engineered for exposed installations where moisture, dust, salt spray, and vibration are concerns. Its sealed cast-aluminum chassis, terminal cover, drain tunnel design, and stainless-steel mounting hardware support use in marine and off-road environments. The main unit is rated for IPX7, IPX6, and IP6X protection and is tested to ASTM B117 salt-spray standards.\u003c\/p\u003e\u003cp\u003eThis amplifier is a practical foundation for a compact audio upgrade that does not require a traditional head unit. Its RCA pre-output can feed an additional amplifier or powered subwoofer for future system expansion. A switchable 2-channel or 3\/4-channel output mode and remote-controlled pre-out level provide flexible setup options.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Class D Power:\u003c\/strong\u003e Delivers 50 watts RMS per channel at 4 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect Bluetooth Streaming:\u003c\/strong\u003e Plays compatible device audio without an RCA source input.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeather-Resistant Construction:\u003c\/strong\u003e IPX7, IPX6, and IP6X-rated main unit protection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Wired Remote:\u003c\/strong\u003e Provides volume, playback, Bluetooth, and EQ control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelectable Crossovers:\u003c\/strong\u003e Adjustable high-pass and low-pass filtering supports system tuning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRCA Pre-Out Expansion:\u003c\/strong\u003e Connect an additional amplifier or powered subwoofer.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe amplifier uses a corrosion-resistant sealed cast-aluminum chassis with a drain tunnel intended to reduce moisture accumulation below the unit. Its one-sided wiring layout, terminal cover, molded strain-relief bushings, and thick die-cast mounting section are intended for organized installation in marine and powersports applications. Stainless-steel self-tapping screws are included for mounting.\u003c\/p\u003e\u003cp\u003eInstall the KAC-M5024BT on a secure surface with ventilation and route its attached power\/ground and speaker-output harnesses safely away from heat, moving parts, and sharp edges. It operates from a 12-volt electrical system with 11 to 16 volts allowable and uses a 40-amp fuse. Connect compatible 2- to 8-ohm speakers, use 4- to 8-ohm loads when bridging channels, and mount the included remote where Bluetooth and playback controls are accessible.\u003c\/p\u003e","brand":"KENWOOD","offers":[{"title":"Default Title","offer_id":45766405292223,"sku":"KAC-M5024BT","price":289.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/71MGZMXqAqL.jpg?v=1782245933"},{"product_id":"rockford-fosgate-p600x4","title":"Rockford Fosgate P600X4 600-Watt 4-Channel Amplifier","description":"\u003cp\u003eThe Rockford Fosgate P600X4 is a four-channel car amplifier designed to add clean, dedicated power to factory-replacement or upgraded speakers. It delivers 75 watts RMS to each of four channels at 4 ohms, making it suitable for systems that need more output and control than a head unit can provide. Its flexible channel configuration also supports bridged operation when higher power is needed for compatible speakers.\u003c\/p\u003e\u003cp\u003eThis amplifier is a practical fit for drivers building a full-range four-speaker system, upgrading front components and rear speakers, or combining front speakers with a bridged pair of rear channels. Its 2-channel input mode can feed all four amplifier channels from a stereo signal, which can simplify integration with select source units. High- and low-level signal capability broadens compatibility with aftermarket and many factory audio systems.\u003c\/p\u003e\u003cp\u003eClass A\/B amplification gives the P600X4 a full-range design intended for speaker and component-system use. The rated frequency response spans 20Hz to 20kHz, while independent front and rear crossover sections help direct the appropriate frequency range to each speaker group. This makes it easier to configure high-pass filtering for door speakers or low-pass filtering for a bridged woofer application.\u003c\/p\u003e\u003cp\u003eRockford Fosgate's C.L.E.A.N. setup system uses input and output clip indicators to assist with gain adjustment. This helps identify clipping at the source or amplifier during setup, allowing the installer to set levels with more information than a conventional gain control alone. The amplifier also includes front and rear Punch EQ controls for system tuning.\u003c\/p\u003e\u003cp\u003eThe P600X4 is built for conventional 12-volt vehicle electrical systems and uses a cast-aluminum heatsink with convection cooling. RCA pass-through outputs allow an additional amplifier to be added without splitting the source signal. It is a strong foundation for a staged system upgrade where speaker power, tuning flexibility, and future expansion matter.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel RMS Power:\u003c\/strong\u003e Supplies 75 watts RMS per channel at 4 ohms or 150 watts RMS per channel at 2 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridgeable Channel Pairs:\u003c\/strong\u003e Delivers 300 watts RMS x 2 at 4 ohms bridged for compatible higher-power applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh- And Low-Level Inputs:\u003c\/strong\u003e Accepts speaker-level or RCA-level source signals through its RCA input connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eC.L.E.A.N. Setup:\u003c\/strong\u003e Input and output clip indicators help establish usable source volume and amplifier gain settings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Crossovers:\u003c\/strong\u003e Front and rear high-pass or low-pass filters adjust from 50Hz to 250Hz.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRCA Pass-Through:\u003c\/strong\u003e Provides a full-range signal output for adding compatible amplifiers to the system.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe P600X4 uses a cast-aluminum heatsink, convection cooling, captive C-clamp terminals, and a stealth top-mounted control panel. Its power and ground terminals accept up to 4 AWG wire, while the speaker terminals accept 8 AWG to 18 AWG wire. Power, protect, thermal, input-clip, and output-clip indicators provide useful status information during installation and operation.\u003c\/p\u003e\u003cp\u003eUse the P600X4 for four full-range speakers, a two-channel stereo plus one bridged channel pair, or two bridged channel pairs within its stated impedance limits. It requires a separately purchased 100-amp fuse installed in the main power cable near the battery, and Rockford Fosgate specifies no lower than 2 ohms per stereo channel or 4 ohms bridged. Leave at least 1 inch of air space around the heatsink and do not install the amplifier in the engine compartment.\u003c\/p\u003e","brand":"ROCKFORD FOSGATE","offers":[{"title":"Default Title","offer_id":45768011579583,"sku":"P600X4","price":407.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/71geIQgASTL.jpg?v=1782270310"},{"product_id":"rockford-fosgate-pbr400x4d","title":"Rockford Fosgate PBR400X4D Compact 4-Channel Amplifier","description":"\u003cp\u003eThe Rockford Fosgate Punch PBR400X4D is a compact four-channel car audio amplifier for systems that need added speaker power where installation space is limited. It delivers full-range Class D amplification for front-and-rear speakers, component systems, or other four-channel applications. Its compact chassis is well suited to cars, trucks, motorcycles, ATVs, and similar vehicles where a conventional amplifier may be difficult to place.\u003c\/p\u003e\u003cp\u003eAt 4 ohms, the PBR400X4D provides 50 watts RMS to each of four channels, with up to 100 watts RMS per channel at 2 ohms. It can also be bridged to run two 4-ohm channels at 200 watts RMS each. This flexibility lets it support a straightforward four-speaker upgrade or a higher-output two-channel configuration when paired with compatible speakers.\u003c\/p\u003e\u003cp\u003eThe amplifier uses a full-range Class D design with Rockford Fosgate Boosted Rail Technology. This approach is designed to provide its rated output in a small enclosure while operating from a 9 to 16 VDC vehicle electrical system. The result is a practical option for compact systems that need efficient amplification without the larger footprint of many conventional multi-channel amplifiers.\u003c\/p\u003e\u003cp\u003eIts differential signal inputs accept either low-level RCA signals or high-level speaker signals from a source unit. When high-level input is used, the amplifier supports automatic turn-on behavior, which can simplify integration with many factory radios. A 2-channel\/4-channel input selector also allows four amplified outputs to be operated from only the front input pair when needed.\u003c\/p\u003e\u003cp\u003eSelectable fixed crossovers help tailor the amplifier to the speakers and system layout. Each channel section can be set for low-pass, all-pass, 60 Hz high-pass, or 80 Hz high-pass operation. Front and rear gain controls, along with input and output clip indicators, provide useful setup references when matching the amplifier to the source unit and speakers.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Class D Power:\u003c\/strong\u003e Delivers 50 watts RMS to each channel at 4 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-Ohm Stable Outputs:\u003c\/strong\u003e Provides up to 100 watts RMS per channel at 2 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridgeable Channel Pairs:\u003c\/strong\u003e Runs as two 200-watt RMS channels at 4 ohms bridged.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact Chassis:\u003c\/strong\u003e Measures approximately 6.8 by 4.3 by 1.5 inches.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Signal Inputs:\u003c\/strong\u003e Accepts RCA or speaker-level source signals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelectable Crossovers:\u003c\/strong\u003e Offers LP, all-pass, 60 Hz HP, and 80 Hz HP settings.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe PBR400X4D uses a compact metal amplifier chassis with integrated connection harnesses rather than large conventional terminal blocks. Its design includes separate front and rear gain controls, clip-status indicators, crossover selectors, and power\/protection indication. The small format helps accommodate installations with restricted mounting space while still providing four amplified channels.\u003c\/p\u003e\u003cp\u003eFor installation, connect compatible 2-ohm or 4-ohm speakers to the four outputs, or bridge channel pairs only with 4-ohm speaker loads. The amplifier accepts RCA-level input through its signal harnesses, while the same input arrangement can be adapted for high-level speaker input; high-level operation activates its auto turn-on feature. Use appropriately sized power wiring, install the specified external fuse near the battery, provide a clean chassis ground, and leave adequate ventilation around the amplifier.\u003c\/p\u003e","brand":"ROCKFORD FOSGATE","offers":[{"title":"Default Title","offer_id":45768039891135,"sku":"PBR400X4D","price":243.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/717JKXiU76L.jpg?v=1782270333"},{"product_id":"rockford-fosgate-pm400x4","title":"Rockford Fosgate PM400X4 4-Channel Marine Amplifier","description":"\u003cp\u003eThe Rockford Fosgate PM400X4 is a four-channel marine and motorsports amplifier built to add clean, configurable power where a source unit alone is not enough. It is designed for boats, off-road vehicles, and other installations exposed to demanding environments. Its four-channel layout supports front and rear speakers, component systems, or mixed speaker-and-subwoofer configurations.\u003c\/p\u003e\u003cp\u003eRated at 50 watts RMS per channel at 4 ohms, the PM400X4 provides an appropriate power range for many marine coaxial and component speakers. It can also deliver 100 watts RMS per channel at 2 ohms, or 200 watts RMS to each of two bridged 4-ohm channels. This flexibility lets an installer tailor the amplifier to a straightforward four-speaker system or a three-channel system with speakers and a subwoofer.\u003c\/p\u003e\u003cp\u003eThe amplifier uses Class A\/B circuitry for full-range amplification across a 20 Hz to 20 kHz frequency response. Variable high-pass and low-pass crossover controls allow speakers and subwoofers to be assigned more suitable frequency ranges. A built-in Punch EQ provides adjustable bass enhancement at 45 Hz, with treble adjustment also available for additional tonal tuning.\u003c\/p\u003e\u003cp\u003eFor marine and powersports use, the PM400X4 combines a cast-aluminum heatsink with a marine-grade two-part epoxy-coated circuit board and stainless-steel hardware. These construction details are intended to help protect the amplifier's electronics and mounting hardware in moisture-prone installations. Short-circuit, over-current, and thermal protection circuits add operational safeguards.\u003c\/p\u003e\u003cp\u003eInstallation flexibility includes low-level RCA inputs, high-level input capability, and an automatic turn-on circuit for compatible factory-style speaker-level signals. The 2\/4-channel input selector can simplify signal routing when the source unit has only one pair of outputs. C.L.E.A.N. setup indicators help with gain adjustment, while RCA pass-through outputs can support expansion with another amplifier.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Class A\/B Design:\u003c\/strong\u003e Powers front and rear speakers from one amplifier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible RMS Output:\u003c\/strong\u003e Supports 4-ohm, 2-ohm, and bridged system layouts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Crossovers:\u003c\/strong\u003e Helps direct appropriate frequencies to speakers or subwoofers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePunch EQ:\u003c\/strong\u003e Adds adjustable bass and treble tuning capability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarine-Grade Construction:\u003c\/strong\u003e Uses epoxy-coated circuitry and stainless-steel hardware.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Level Input Capability:\u003c\/strong\u003e Works with compatible speaker-level source signals.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe PM400X4 uses a cast-aluminum heatsink, a stealth top-mounted control panel, marine-grade stainless-steel hardware, and a two-part epoxy coating on its circuit board. Its compact amplifier chassis measures 2.38 by 7.76 by 11.03 inches. Convection cooling and protection circuitry are integrated for normal operating use.\u003c\/p\u003e\u003cp\u003eMount the amplifier in a secure location with ventilation and protection from direct water exposure. Use 4 AWG or 8 AWG power wire, install the required external 60-amp fuse, and match speaker wiring to loads no lower than 2 ohms per channel or 4 ohms when bridged. The variable 50-250 Hz crossover, input selector, and C.L.E.A.N. indicators should be set during installation to suit the connected speakers, subwoofers, and source unit.\u003c\/p\u003e","brand":"ROCKFORD FOSGATE","offers":[{"title":"Default Title","offer_id":45768039989439,"sku":"PM400X4","price":351.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/71Rvm7S_PML.jpg?v=1782270337"},{"product_id":"rockford-fosgate-tm400x4ad","title":"Rockford Fosgate TM400X4ad 400W 4-Channel Marine Amplifier","description":"\u003cp\u003eThe Rockford Fosgate TM400X4ad is a compact four-channel marine and powersports amplifier designed to add substantial, controlled power where installation space is limited. It delivers 100 watts RMS to each of four channels at either 4 or 2 ohms, making it suitable for powering full-range speakers in boats, motorcycles, side-by-sides, and other exposed applications. Its compact chassis helps simplify placement in locations where a conventional amplifier may not fit.\u003c\/p\u003e\u003cp\u003eThis amplifier is a practical choice for systems that need stronger speaker output without requiring a large multi-amplifier installation. Its Constant Power design maintains its rated 100-watt-per-channel output at 4- or 2-ohm stereo loads, which provides flexibility when selecting compatible speakers. It can also be bridged to run two channels at 200 watts RMS each into 4 ohms.\u003c\/p\u003e\u003cp\u003eRockford Fosgate uses proprietary Class-AD amplifier technology in the TM400X4ad for efficient full-range power delivery. The amplifier is dual-fan cooled and uses real-time thermal sensing to support operation under demanding conditions. A dual extruded-aluminum heat sink helps manage heat in its compact enclosure.\u003c\/p\u003e\u003cp\u003eThe TM400X4ad supports both low-level and high-level input signals, allowing it to integrate with aftermarket or factory-style source units. High-level input use enables the auto turn-on feature, while the 2\/4-channel input switch can supply all four outputs from a two-channel source. C.L.E.A.N. input and output clip indicators assist with setting levels to help avoid distortion.\u003c\/p\u003e\u003cp\u003eBuilt-in crossover and equalization controls help tailor the amplifier to a speaker system. Selectable high-pass, low-pass, and all-pass modes are paired with variable 50-250 Hz crossover points and 12 dB\/octave Butterworth filtering. The Punch EQ provides adjustable bass and treble enhancement when appropriate for the installation and source material.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Constant Power:\u003c\/strong\u003e Delivers 100 watts RMS per channel at 4 or 2 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridgeable Output:\u003c\/strong\u003e Supports two 200-watt RMS channels at 4 ohms bridged.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass-AD Topology:\u003c\/strong\u003e Provides efficient full-range amplification in a compact chassis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Level Auto Turn-On:\u003c\/strong\u003e Helps integrate with speaker-level factory audio signals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eC.L.E.A.N. Clip Detection:\u003c\/strong\u003e Input and output indicators assist with accurate gain setup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarine-Ready Circuit Protection:\u003c\/strong\u003e Epoxy-coated circuit boards resist demanding outdoor environments.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe TM400X4ad uses a compact extruded-aluminum heat sink, dual cooling fans, and marine-grade two-part epoxy coating on its circuit boards. Top-mounted controls keep crossover, EQ, and level adjustments accessible after installation. Its chassis measures 1.6 inches high by 4.3 inches wide by 8.3 inches deep.\u003c\/p\u003e\u003cp\u003eUse an 8 AWG power and ground connection, with a 60A fuse installed in the power wiring as specified. The amplifier accepts front and rear high- or low-level signals through its included input harnesses, and its two 4-pin speaker harnesses connect the front and rear speaker outputs. For a two-channel source, select 2-channel input mode; use 4-channel mode when separate front and rear signals are available.\u003c\/p\u003e","brand":"ROCKFORD FOSGATE","offers":[{"title":"Default Title","offer_id":45768040349887,"sku":"TM400X4AD","price":425.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/71zC2lWOlIL.jpg?v=1782270349"},{"product_id":"rockford-fosgate-t1000-4ad","title":"Rockford Fosgate T1000-4AD 4-Channel Car Amplifier","description":"\u003cp\u003eThe Rockford Fosgate Power T1000-4AD is a full-range four-channel car amplifier designed for systems that need substantial power for speakers, component sets, or a mixed speaker-and-subwoofer layout. It provides 1,000 watts RMS total output and supports multiple impedance configurations. Its four channels can be used independently or bridged into two higher-power channels.\u003c\/p\u003e\u003cp\u003eThis amplifier suits enthusiasts upgrading factory or aftermarket audio systems where high-output door speakers, separates, or multi-zone audio need dedicated amplification. A 2-channel\/4-channel input switch supports installations using either two or four RCA signal channels from the source unit. RCA pass-through outputs can also help route signal to an additional amplifier.\u003c\/p\u003e\u003cp\u003eRockford Fosgate's Constant Power design is rated at 250 watts RMS per channel at 4, 2, or 1 ohm. When configured in bridged mode, it delivers 500 watts RMS per pair at 4 or 2 ohms. This flexibility allows system designers to match the amplifier to a wide range of compatible speaker loads.\u003c\/p\u003e\u003cp\u003eThe Class-AD topology combines a full-range design with efficient operation, while dynamic switching frequency control is intended to support clean audio reproduction. Differential balanced RCA inputs help reduce noise susceptibility in a vehicle environment. Variable Punch EQ provides bass and treble adjustment, and selectable high-pass or low-pass crossovers support speaker protection and system tuning.\u003c\/p\u003e\u003cp\u003eThe T1000-4AD is intended for a properly planned vehicle electrical system, with 4 AWG power and ground wiring plus an external 150-amp fuse. Its compact chassis can be mounted in a trunk, cargo area, or other ventilated location with adequate clearance. It is a strong fit as the main amplifier in a high-powered full-range system or as part of a larger multi-amplifier build.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Output:\u003c\/strong\u003e Powers four speakers independently or two bridged channel pairs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstant Power Circuitry:\u003c\/strong\u003e Maintains its rated 250-watt-per-channel output across 1-, 2-, and 4-ohm stereo loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass-AD Topology:\u003c\/strong\u003e Delivers full-range amplification with efficient operation for demanding vehicle audio systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e24 dB\/Octave Crossovers:\u003c\/strong\u003e Adjustable high-pass and low-pass filters help match output to speakers or subwoofers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDifferential RCA Inputs:\u003c\/strong\u003e Balanced input design helps reject noise introduced through vehicle signal wiring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Punch EQ:\u003c\/strong\u003e Provides adjustable bass and treble shaping for front and rear channel sections.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe T1000-4AD uses a MOSFET power supply and MOSFET output stage in a cast-aluminum heatsink chassis. It is cooled by convection and includes blue power, red thermal, and yellow protect status indicators. Audiophile-grade speaker connections and block-style power and speaker terminals support secure system wiring.\u003c\/p\u003e\u003cp\u003eUse 4 AWG power and ground wiring, install the required external 150-amp fuse, and provide sufficient ventilation around the amplifier. Connect source-unit RCA outputs to the front and rear input pairs, then select 2-channel or 4-channel input operation as needed. Set gain, crossover, and Punch EQ controls conservatively during initial setup, and use compatible speaker loads for stereo or bridged operation.\u003c\/p\u003e","brand":"ROCKFORD FOSGATE","offers":[{"title":"Default Title","offer_id":45768043036863,"sku":"T1000-4AD","price":730.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/610NxttUC7L.jpg?v=1782270415"},{"product_id":"rockford-fosgate-p400x4","title":"Rockford Fosgate P400X4 400W 4-Channel Amplifier","description":"\u003cp\u003eThe Rockford Fosgate P400X4 is a four-channel car amplifier designed to add dedicated power to factory-replacement or aftermarket speakers. It provides a practical upgrade path for systems that need more output and control than a head unit’s built-in amplifier can provide. Its four-channel layout supports front and rear speakers, or alternate bridged-channel configurations.\u003c\/p\u003e\u003cp\u003eRated at 50 watts RMS per channel at 4 ohms and 100 watts RMS per channel at 2 ohms, the P400X4 is suited to full-range speaker systems with appropriately matched power handling. It can also bridge its channels to deliver 200 watts RMS x 2 at 4 ohms. This flexibility allows it to serve a conventional four-speaker installation or a system combining stereo speakers with bridged channels.\u003c\/p\u003e\u003cp\u003eThe P400X4 uses a Class A\/B circuit topology for full-range amplification across a 20 Hz to 20 kHz frequency response. Separate front and rear crossover sections let an installer tailor the signal for speakers or subwoofer duties. The onboard Punch EQ provides adjustable bass and treble shaping according to the selected crossover mode.\u003c\/p\u003e\u003cp\u003eIts RCA inputs accept high-level speaker signal or low-level RCA signal, helping it integrate with a wide range of source units. When high-level input is used, the amplifier can use its auto turn-on function. RCA pass-through outputs support expansion to additional amplifiers without splitting the incoming signal externally.\u003c\/p\u003e\u003cp\u003eRockford Fosgate includes C.L.E.A.N. clip-indicator setup support to help establish source-unit and amplifier levels during installation. Power, protect, thermal, input-clip, and output-clip indicators provide useful operating feedback. The compact chassis is intended for vehicle mounting with adequate airflow around its heatsink.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Power:\u003c\/strong\u003e Supplies 50 watts RMS x 4 at 4 ohms for speaker-system upgrades.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-Ohm Stability:\u003c\/strong\u003e Delivers 100 watts RMS x 4 into compatible 2-ohm speaker loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridgeable Channels:\u003c\/strong\u003e Provides 200 watts RMS x 2 at 4 ohms bridged.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh- and Low-Level Inputs:\u003c\/strong\u003e Connects to speaker-level or RCA-level source signals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelectable Crossovers:\u003c\/strong\u003e Front and rear HP, LP, and all-pass settings aid system tuning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eC.L.E.A.N. Setup Indicators:\u003c\/strong\u003e Helps set input and output levels while monitoring clipping.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe P400X4 combines a cast-aluminum heatsink with convection cooling and a top-mounted control panel. Its captive C-clamp power and speaker terminals provide secured wire connections, while the status LEDs identify power, protection, thermal, and clipping conditions. The amplifier measures 2.38 x 7.76 x 11.03 inches, making it suitable for many trunk, hatch, and amp-rack installations.\u003c\/p\u003e\u003cp\u003eUse a 60-amp external fuse on the battery power lead and keep the fuse within 18 inches of the battery connection. The amplifier supports 2-ohm stereo loads or 4-ohm bridged loads; lower impedances are not recommended. Allow at least 1 inch of air space around the heatsink, connect all active RCA inputs, and use the front\/rear crossover controls to match the speakers and intended channel assignment.\u003c\/p\u003e","brand":"ROCKFORD FOSGATE","offers":[{"title":"Default Title","offer_id":45768043200703,"sku":"P400X4","price":298.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/71jkz3vPWDL.jpg?v=1782270419"},{"product_id":"rockford-fosgate-pm600x4","title":"Rockford Fosgate PM600X4 4-Channel Marine Amplifier","description":"\u003cp\u003eThe Rockford Fosgate PM600X4 is a marine-grade four-channel amplifier designed to add clean, configurable power to boat and motorsports audio systems. It is suited to installations that need more output than a source unit can provide while retaining flexible speaker-system options. Its 600-watt total RMS rating supports full-range speakers, subwoofers, or a combination of both.\u003c\/p\u003e\u003cp\u003eThis amplifier can operate as a conventional four-channel model, a bridged two-channel model, or a three-channel system with front speakers and a bridged rear subwoofer channel pair. It delivers 75 watts RMS to each channel at 4 ohms or 150 watts RMS to each channel at 2 ohms. When bridged, it provides 300 watts RMS per pair at 4 ohms.\u003c\/p\u003e\u003cp\u003eIts Class A\/B circuit topology is intended for detailed full-range amplification, with a frequency response rated from 20 Hz to 20 kHz. Adjustable high-pass and low-pass crossovers help direct appropriate frequencies to speakers or subwoofers. Front and rear Punch EQ controls provide bass and treble adjustment for system tuning.\u003c\/p\u003e\u003cp\u003eThe PM600X4 is built for use around water, dust, and changing temperatures in marine and powersports environments. It uses a conformal-coated circuit board with a marine-grade two-part epoxy coating, marine-grade stainless-steel hardware, and a cast-aluminum heatsink. Convection cooling and protection circuitry support dependable operation in properly installed systems.\u003c\/p\u003e\u003cp\u003eFor system expansion, the amplifier provides high- and low-level input capability, automatic turn-on capability with high-level inputs, and RCA pass-through outputs. Its C.L.E.A.N. setup system uses clip indicators to help set amplifier gain appropriately. An optional Rockford Fosgate PLC2 Punch Level Control can be added for convenient level adjustment.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel RMS Power:\u003c\/strong\u003e Delivers 75 watts x 4 at 4 ohms or 150 watts x 4 at 2 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridged Operation:\u003c\/strong\u003e Combines channel pairs for 300 watts x 2 at 4 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass A\/B Topology:\u003c\/strong\u003e Supports full-range speaker and mixed speaker-subwoofer system designs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Crossovers:\u003c\/strong\u003e High-pass and low-pass filters help match output to connected speakers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarine-Grade Construction:\u003c\/strong\u003e Coated circuitry and stainless hardware support marine and powersports use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eC.L.E.A.N. Setup:\u003c\/strong\u003e Clip indicators assist with accurate gain adjustment during installation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe PM600X4 uses a compact cast-aluminum heatsink measuring approximately 13.3 by 7.8 by 2.4 inches. Its top-mounted control panel keeps adjustments accessible while maintaining a clean installation appearance. The circuit board receives a marine-grade two-part epoxy coating, and the amplifier uses marine-grade stainless-steel hardware.\u003c\/p\u003e\u003cp\u003eUse 4 AWG power wiring and install the recommended 100-amp fuse in the main power run. The amplifier accepts high- or low-level signal input through two pairs of RCA inputs and provides one pair of RCA pass-through outputs. Match stereo channels to 2- or 4-ohm speaker loads, and use only a 4-ohm load per bridged channel pair.\u003c\/p\u003e","brand":"ROCKFORD FOSGATE","offers":[{"title":"Default Title","offer_id":45768043790527,"sku":"PM600X4","price":445.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/61_PpTWAm4L.jpg?v=1782270436"},{"product_id":"rockford-fosgate-r2-300x4","title":"Rockford Fosgate R2-300X4 4-Channel Class-D Amplifier","description":"\u003cp\u003eThe Rockford Fosgate Prime R2-300X4 is a full-range, four-channel Class-D amplifier for upgrading factory or aftermarket vehicle audio systems. It provides dedicated amplification for front and rear speakers, helping a system play with greater control and output than a head unit’s built-in amplifier. With 300 watts of total rated RMS power, it is designed for compact multi-speaker installations.\u003c\/p\u003e\u003cp\u003eThis amplifier is well suited to drivers replacing factory door speakers or building a balanced front-and-rear speaker system. It delivers 50 watts RMS to each of four channels at 4 ohms, or 75 watts RMS per channel at 2 ohms. Each front\/rear channel pair can also be bridged for higher-power two-channel configurations using compatible 4-ohm loads.\u003c\/p\u003e\u003cp\u003eClass-D topology helps reduce electrical demand while keeping the amplifier compact. The R2-300X4 has a 20 Hz to 20 kHz frequency response for full-range speaker use, making it appropriate for component speakers, coaxials, and other midrange\/high-frequency applications. Adjustable front and rear crossovers allow the system to be configured around the speakers and any separate subwoofer system.\u003c\/p\u003e\u003cp\u003eRockford Fosgate C.L.E.A.N. circuitry uses input and output clip indicators to assist with gain setup. Balanced differential inputs, high-level input capability, and a 2\/4-channel input switch support integration with a variety of factory and aftermarket source units. RCA pass-through outputs can feed an additional amplifier when expanding the system.\u003c\/p\u003e\u003cp\u003eThe R2-300X4 is built for practical system upgrades rather than requiring a complex signal chain. Its selectable Punch EQ, variable gain controls, and top-mounted adjustment panel make it easier to fine-tune a four-speaker installation. A compact chassis and convection cooling support installation in many vehicle locations with suitable ventilation.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Class-D Power:\u003c\/strong\u003e Delivers 50 watts RMS per channel at 4 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridgeable Channel Pairs:\u003c\/strong\u003e Supports 150 watts RMS x 2 at 4 ohms bridged.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eC.L.E.A.N. Setup:\u003c\/strong\u003e Clip indicators help set amplifier gain levels accurately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Crossovers:\u003c\/strong\u003e Front and rear HPF, LPF, or all-pass settings aid system tuning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Inputs:\u003c\/strong\u003e Accepts low-level RCA or high-level speaker signals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRCA Pass-Through:\u003c\/strong\u003e Provides outputs for adding another amplifier.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe R2-300X4 uses a cast-aluminum heat sink with convection cooling and a compact 1.9-inch-high chassis. Its compression terminal blocks provide secure power and speaker connections, while the top-mounted controls keep setup adjustments accessible after installation. Power, protect, and C.L.E.A.N. status indicators provide visual operating feedback.\u003c\/p\u003e\u003cp\u003eUse 4 AWG power and ground wiring with a properly installed 60-amp fuse, and use suitable speaker wire up to 8 AWG. The amplifier accepts RCA preamp signals or high-level speaker signals, making it suitable for many factory-radio and aftermarket-radio installations. Mount it securely in a ventilated location, and configure its front and rear crossover sections to match the speakers and overall system design.\u003c\/p\u003e","brand":"ROCKFORD FOSGATE","offers":[{"title":"Default Title","offer_id":45768047952063,"sku":"R2-300X4","price":208.84,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/71b4UILM1TL.jpg?v=1782270530"},{"product_id":"rockford-fosgate-m2-300x4","title":"Rockford Fosgate M2-300X4 4-Channel Marine Amplifier","description":"\u003cp\u003eThe Rockford Fosgate M2-300X4 is a four-channel, full-range marine amplifier designed to add dedicated power to speakers in boats and other exposed installations. Its 300-watt RMS total rating supports a variety of stereo speaker-system layouts. The compact chassis helps provide a practical amplification upgrade where space is limited.\u003c\/p\u003e\u003cp\u003eThis amplifier is suited to systems using four 4-ohm or 2-ohm speakers, or two bridged 4-ohm speaker loads. It delivers 50 watts RMS to each of four channels at 4 ohms, or 75 watts RMS per channel at 2 ohms. For a bridged configuration, it produces 150 watts RMS across each of two 4-ohm channels.\u003c\/p\u003e\u003cp\u003eIts full-range Class D design covers a 20 Hz to 20 kHz frequency response for use with marine coaxial speakers, component speakers, or other full-range drivers. Class D operation is designed for efficient power delivery and reduced demand on the electrical system. Adjustable front and rear high-pass or low-pass crossovers help tailor the signal for the speakers being used.\u003c\/p\u003e\u003cp\u003eThe M2-300X4 uses Rockford Fosgate C.L.E.A.N. input and output clip indicators to assist with gain setup. Its P.O.W.E.R. supply is designed to increase output as supply voltage increases. A 2\/4-channel input switch and RCA pass-through outputs support flexible integration with both compact and expanded systems.\u003c\/p\u003e\u003cp\u003eElement Ready construction addresses the environmental demands of marine and outdoor audio installations. The amplifier uses a conformal-coated circuit board, a UV-stable powder-coated cast-aluminum heatsink, and zinc-nickel-plated marine-grade brass terminals. It can serve as the main amplifier for four speakers or as part of a larger system with an additional subwoofer amplifier.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Class D Power:\u003c\/strong\u003e Supplies full-range amplification for up to four speakers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElement Ready Construction:\u003c\/strong\u003e Helps protect electronics against outdoor exposure, dust, and water.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eC.L.E.A.N. Indicators:\u003c\/strong\u003e Input and output clip LEDs assist gain adjustment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable Crossovers:\u003c\/strong\u003e Front and rear HPF\/LPF settings aid speaker matching.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2\/4-Channel Input Switch:\u003c\/strong\u003e Works with two- or four-channel source signals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRCA Pass-Through Outputs:\u003c\/strong\u003e Allows signal routing to another amplifier.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe M2-300X4 has a UV-stable powder-coated cast-aluminum heatsink and convection cooling. Its circuit board is conformal coated, while its integrated connection terminals use zinc-nickel-plated marine-grade brass. Top-mounted controls provide access to setup adjustments after mounting.\u003c\/p\u003e\u003cp\u003eUse 4 AWG power wiring and protect the power connection with a 60-amp fuse, which is not included. The amplifier accepts RCA low-level inputs or high-level inputs through its front and rear 4-pin Molex connections; high-level input supports Auto-Sense turn-on with a RAP bypass switch. Mount it securely in a location that allows ventilation, follow the owner's manual for wiring and impedance requirements, and use only 4-ohm loads when bridging channels.\u003c\/p\u003e","brand":"ROCKFORD FOSGATE","offers":[{"title":"Default Title","offer_id":45768050344127,"sku":"M2-300X4","price":259.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/71kqca1e0WL.jpg?v=1782270577"},{"product_id":"rockford-fosgate-t400x4ad","title":"Rockford Fosgate T400X4AD 400W 4-Channel Amplifier","description":"\u003cp\u003eThe Rockford Fosgate T400X4AD is a compact four-channel car amplifier designed to add clean, controlled power to a vehicle speaker system. Its 400-watt rated total output supports a conventional four-speaker layout or a two-channel bridged setup. The small chassis helps solve installation-space limitations in cars, trucks, motorcycles, and side-by-side vehicles.\u003c\/p\u003e\u003cp\u003eThis amplifier is suited to listeners upgrading factory-powered speakers or building an aftermarket full-range system. It supplies 100 watts RMS to each of four channels at either 4 ohms or 2 ohms, allowing flexible speaker matching within its rated load range. When bridged, it delivers 200 watts RMS to each of two 4-ohm channels.\u003c\/p\u003e\u003cp\u003eClass-AD circuitry and Constant Power operation are central to the T400X4AD design. The amplifier maintains its rated 100-watt-per-channel output at both 4-ohm and 2-ohm stereo loads. This makes it practical for systems where installation needs or speaker wiring determine the final impedance.\u003c\/p\u003e\u003cp\u003eIntegrated crossover controls help tailor the signal for full-range speakers, tweeters, midbass drivers, or a bridged pair of compatible speakers. High-pass, low-pass, and all-pass selections are available, with adjustable high-pass and low-pass points from 50 Hz to 250 Hz. Punch EQ provides separate bass and treble adjustment for modest system voicing changes.\u003c\/p\u003e\u003cp\u003eThe T400X4AD accepts front and rear high-level or low-level signals through harness connections, making it suitable for factory-radio and aftermarket-head-unit installations. Its high-level input capability includes automatic turn-on, reducing the need for a separate remote-turn-on connection in applicable installations. C.L.E.A.N. input and output clip indicators assist with setting source volume and amplifier gain during system setup.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Constant Power:\u003c\/strong\u003e Delivers 100 watts RMS per channel at 4 or 2 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridged Operation:\u003c\/strong\u003e Combines channels for 200 watts RMS x 2 at 4 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass-AD Topology:\u003c\/strong\u003e Provides efficient full-range amplification in a compact enclosure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh- and Low-Level Inputs:\u003c\/strong\u003e Supports aftermarket radios and compatible factory speaker-level signals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eC.L.E.A.N. Clip Indicators:\u003c\/strong\u003e Helps set source level and amplifier gain with visual feedback.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable Crossovers and Punch EQ:\u003c\/strong\u003e Enables basic speaker filtering and tonal adjustment.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe amplifier uses a compact aluminum extruded heatsink design with dual-fan cooling and real-time thermal sensing. Top-mounted controls provide access to gain, crossover, EQ, and setup functions after installation. Its detachable compression power terminal and harness-based signal and speaker connections support space-conscious mounting layouts.\u003c\/p\u003e\u003cp\u003eMount the amplifier on a solid surface with adequate airflow around the cooling system. Use 8 AWG power and ground wiring, a separately purchased 60-amp fuse, and 16 AWG speaker wire as specified. Configure the 2\/4-channel input switch, crossover mode, and gain settings to match the connected source unit and speakers.\u003c\/p\u003e","brand":"ROCKFORD FOSGATE","offers":[{"title":"Default Title","offer_id":45768051720383,"sku":"T400X4AD","price":425.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/61M8GZUoafL.jpg?v=1782270599"},{"product_id":"rockford-fosgate-t600-4","title":"Rockford Fosgate T600-4 600W 4-Channel Amplifier","description":"\u003cp\u003eThe Rockford Fosgate Power T600-4 is a four-channel car audio amplifier for adding clean, dedicated power to front and rear speakers or a mixed speaker-and-subwoofer system. It is rated for 600 watts RMS total and gives installers flexible four-channel, two-channel, and bridged configuration options. This makes it a practical choice for replacing head-unit power in a system that needs more output and control.\u003c\/p\u003e\u003cp\u003eAt 4 ohms, the T600-4 delivers 100 watts RMS to each of its four channels, while 2-ohm operation raises output to 150 watts RMS per channel. It can also bridge into two 4-ohm loads for 300 watts RMS per bridged pair. The amplifier is 2-ohm stable when configured as two bridged channels.\u003c\/p\u003e\u003cp\u003eThe Class A\/B circuit topology is intended for full-range amplification, with a 20 Hz to 20 kHz frequency response. Separate front and rear crossover controls help tailor the amplifier for component speakers, coaxials, or a front-stage-plus-subwoofer arrangement. Variable Punch EQ provides bass and treble adjustment for each channel pair.\u003c\/p\u003e\u003cp\u003eDifferential RCA inputs support connection to an aftermarket source unit, while the 2-channel\/4-channel input switch can simplify signal routing when only one stereo RCA pair is available. A low-level RCA pass-through output can feed another amplifier in an expanded system. Power, thermal, and protect indicators provide at-a-glance operating status.\u003c\/p\u003e\u003cp\u003eIts compact 2.14-inch-high chassis is suited to installations where amplifier space is limited but substantial full-range power is required. The T600-4 uses a MOSFET power supply and MOSFET output stage, along with convection cooling. It is a strong fit for a multi-speaker upgrade that may later add a second amplifier through its RCA pass-through output.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e600 Watts RMS Total:\u003c\/strong\u003e Supplies substantial continuous power across four channels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Channel Configuration:\u003c\/strong\u003e Operates in four-channel or bridged two-channel system layouts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass A\/B Topology:\u003c\/strong\u003e Supports full-range speaker amplification with broad frequency response.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e24 dB\/Octave Crossovers:\u003c\/strong\u003e Helps match channels to speakers or subwoofers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePunch EQ Controls:\u003c\/strong\u003e Allows bass and treble adjustment by channel pair.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRCA Pass-Through Output:\u003c\/strong\u003e Supports adding another amplifier without splitting the source signal.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe T600-4 combines a compact chassis with a MOSFET power supply, MOSFET output stage, convection cooling, and a heatsink-based thermal design. Its connection layout includes 4 AWG power and ground connections, audiophile-grade speaker connections, RCA inputs, and an RCA pass-through output. Front-panel indicators identify power, thermal, and protection status.\u003c\/p\u003e\u003cp\u003eUse 4 AWG power and ground wiring, protect the power lead with the specified external fuse, and connect the amplifier to a suitable 9 to 16 VDC vehicle electrical system. Match speakers to the selected stereo or bridged impedance configuration, and use the front and rear high-pass or low-pass filters to suit the speakers connected to each channel pair. For bridged operation, use the amplifier's specified wiring arrangement and only connect supported loads.\u003c\/p\u003e","brand":"ROCKFORD FOSGATE","offers":[{"title":"Default Title","offer_id":45768051916991,"sku":"T600-4","price":497.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/61JdTm7uXLL.jpg?v=1782270601"},{"product_id":"rockford-fosgate-m5-800x4","title":"Rockford Fosgate M5-800X4 4-Channel Marine Amplifier","description":"\u003cp\u003eThe Rockford Fosgate M5-800X4 is a compact four-channel amplifier designed for marine, motorcycle, and powersports audio systems. It provides dedicated amplification for up to four full-range speakers while using an Element Ready design suited to exposed installations. Its compact chassis helps solve mounting challenges where space is limited.\u003c\/p\u003e\u003cp\u003eThis amplifier is intended for riders, boaters, and off-road enthusiasts building a powered speaker system that needs to operate in demanding outdoor conditions. It delivers 100 watts RMS per channel at either 2 or 4 ohms, with bridge capability for compatible 4-ohm speaker loads. Dynamic Power ratings provide additional output measurement under the CTA-2006 standard.\u003c\/p\u003e\u003cp\u003eThe M5-800X4 uses Class-AD amplification and Rockford Fosgate Constant Power technology for stable output across supported speaker impedances. Its frequency response spans 10 Hz to 50 kHz, allowing it to support full-range speaker applications. Adjustable high-pass and low-pass crossovers help match the amplifier to the speakers and role it serves in the system.\u003c\/p\u003e\u003cp\u003eElement Ready construction includes IPX6 water-spray protection, sealed harness connections, and a protected top-mounted control panel. The C.L.E.A.N. setup system uses input and output clip indicators to assist with level matching. Balanced differential inputs and signal-sense\/DC-offset turn-on support integration with OEM and aftermarket source units.\u003c\/p\u003e\u003cp\u003eUse the M5-800X4 to power front and rear speakers, a four-speaker marine zone, or two bridged speaker channels where system design permits. A PRESET switch supports select Rockford Fosgate UTV audio-kit applications, while manual controls remain available when the preset is off. Its compact size and integrated harness arrangement make it suitable for installations where conventional amplifier terminals are difficult to access.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Output:\u003c\/strong\u003e Powers four speakers or supports two bridged channels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElement Ready Design:\u003c\/strong\u003e IPX6 water-spray protection supports outdoor audio installations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass-AD Topology:\u003c\/strong\u003e Delivers efficient full-range amplification in a compact chassis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstant Power:\u003c\/strong\u003e Maintains output across supported 2- and 4-ohm loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eC.L.E.A.N. Indicators:\u003c\/strong\u003e Input and output clip LEDs assist level setup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable Crossovers:\u003c\/strong\u003e High-pass and low-pass filters help tailor speaker operation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe M5-800X4 has a 1.7-inch-high chassis with IPX6 water-spray protection, integrated sealed harnesses, and a smoked control-panel cover. Its focused-mass heat sink concentrates aluminum around critical internal components. The top-mounted controls are protected while remaining accessible for setup.\u003c\/p\u003e\u003cp\u003ePlan for an external power and ground connection using 8 AWG cable, plus individually fused amplifier power wiring. The amplifier accepts RCA low-level or high-level input through its harness system and includes adapters for installation. For full-range speakers, set the crossover to high-pass as appropriate; use bridged channels only with compatible 4-ohm loads and follow the manufacturer wiring guidance.\u003c\/p\u003e","brand":"ROCKFORD FOSGATE","offers":[{"title":"Default Title","offer_id":45768079311039,"sku":"M5-800X4","price":518.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/71zGZQF_zAL_f2f0212d-8152-4ed2-9f14-254001c1ec9d.jpg?v=1782271112"},{"product_id":"rockford-fosgate-t400-4","title":"Rockford Fosgate T400-4 400W 4-Channel Amplifier","description":"\u003cp\u003eThe Rockford Fosgate Power T400-4 is a four-channel car amplifier designed to add dedicated power to front and rear speakers in an aftermarket audio system. It delivers 60 watts RMS to each of four channels at 4 ohms, helping compatible speakers play with more headroom than a typical factory radio amplifier. Its four-channel layout supports conventional front\/rear speaker systems and can also be configured for bridged operation.\u003c\/p\u003e\u003cp\u003eThis amplifier suits listeners building a balanced full-range system with component speakers, coaxials, or a combination of speakers and small subwoofer channels. It can run four speakers at 2 or 4 ohms, or bridge its channels into two higher-output channels. The 2\/4-channel input selector can simplify integration when a source unit has only one pair of RCA outputs.\u003c\/p\u003e\u003cp\u003eThe T400-4 uses a Class A\/B circuit topology with MOSFET power-supply and output stages. Its rated frequency response is 20 Hz to 20 kHz, allowing it to cover the full audible range for appropriately configured speakers. Differential RCA inputs are designed to help reject induced noise in the signal path.\u003c\/p\u003e\u003cp\u003eAdjustable front and rear crossover sections let the amplifier be tuned for the speakers connected to each channel pair. Each section provides selectable high-pass or low-pass filtering from 50 to 500 Hz with a 24 dB-per-octave Butterworth slope. Separate Punch EQ controls provide bass adjustment at 45 Hz and treble adjustment at 12 kHz.\u003c\/p\u003e\u003cp\u003eThe compact chassis is intended for installations where amplifier space is limited, including many under-seat or trunk locations with adequate ventilation. Dynamic Thermal Management and protection circuitry support dependable operation when the amplifier is installed and wired correctly. Pair it with compatible speakers, RCA signal cables, suitable power wiring, and an externally fused power connection for a complete upgrade path.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Output:\u003c\/strong\u003e Powers front and rear speakers from one amplifier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridged Capability:\u003c\/strong\u003e Combines channel pairs for higher-output two-channel configurations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass A\/B Topology:\u003c\/strong\u003e Provides full-range amplification with rated 20 Hz–20 kHz response.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e24 dB Crossovers:\u003c\/strong\u003e Separately tune front and rear speaker frequency ranges.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDifferential RCA Inputs:\u003c\/strong\u003e Helps reduce noise entering through signal cables.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePunch EQ Controls:\u003c\/strong\u003e Adjusts bass and treble response for system tuning.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe T400-4 combines MOSFET power and output stages with a focused-mass die-cast heatsink design. Its Dynamic Thermal Management and NOMAD protection circuitry are intended to monitor operating conditions and protect the amplifier from overload-related faults. Power, thermal, and protect indicators provide basic operating-status feedback.\u003c\/p\u003e\u003cp\u003eUse the amplifier with 2- or 4-ohm speaker loads per channel, or bridge channel pairs as specified for the installation. The amplifier accepts RCA-level input through front and rear RCA pairs and provides a 2\/4-channel input selector; it does not provide signal outputs. Install an external 100-amp fuse in the power wiring, use correctly sized power and speaker cable, make a solid chassis ground connection, and leave room around the heatsink for convection cooling.\u003c\/p\u003e","brand":"ROCKFORD FOSGATE","offers":[{"title":"Default Title","offer_id":45768079704255,"sku":"T400-4","price":331.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/61F77Z2CgQL.jpg?v=1782271127"},{"product_id":"rockford-fosgate-r2-500x4","title":"Rockford Fosgate R2-500X4 4-Channel Amplifier","description":"\u003cp\u003eThe Rockford Fosgate Prime R2-500X4 is a full-range, four-channel car amplifier designed to add dedicated power to an upgraded speaker system. It delivers 75 watts RMS to each of four channels at 4 ohms, giving compatible door, dash, or rear-deck speakers more headroom than most factory-radio power. Its compact chassis is suited to installations where available mounting space is limited.\u003c\/p\u003e\u003cp\u003eThis amplifier is a practical choice for listeners building a clearer, more controlled full-range system without adding a separate amplifier for every speaker pair. It can run four speakers in stereo at either 4 or 2 ohms, or it can be bridged into two channels for higher-output applications. Variable high-pass and low-pass crossovers help direct the appropriate frequency range to the speakers connected to each channel pair.\u003c\/p\u003e\u003cp\u003eThe R2-500X4 uses full-range Class-D amplifier topology, which is designed for efficient operation in a vehicle electrical system. Its rated output is 125 watts RMS per channel at 2 ohms, while bridged operation provides 250 watts RMS per channel into 4-ohm loads. A 20 Hz to 20 kHz frequency response supports use with speakers across the normal audible range.\u003c\/p\u003e\u003cp\u003eRockford Fosgate C.L.E.A.N. setup circuitry uses input and output clip indicators to assist with gain adjustment. Balanced differential inputs are intended to reduce noise picked up by signal cables, while RCA pass-through outputs can feed an additional amplifier. The amplifier also supports both low-level RCA and high-level speaker inputs for integration with many aftermarket or factory audio systems.\u003c\/p\u003e\u003cp\u003eFor a staged system, the R2-500X4 can power front and rear speakers while a separate mono amplifier handles a subwoofer. Its 2\/4-channel input selector can simplify signal routing when the source unit has fewer than four output channels. Top-mounted controls, separate front and rear gain adjustment, and independently adjustable front and rear crossover sections help make system tuning more accessible after installation.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel RMS Power:\u003c\/strong\u003e Delivers 75 watts RMS x 4 at 4 ohms or 125 watts RMS x 4 at 2 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridged Capability:\u003c\/strong\u003e Combines channel pairs for 250 watts RMS x 2 into 4-ohm loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull-Range Class-D Design:\u003c\/strong\u003e Provides efficient amplification for component, coaxial, and other full-range speakers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eC.L.E.A.N. Setup Circuitry:\u003c\/strong\u003e Clip indicators assist with setting gain levels for a cleaner signal path.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Butterworth Crossovers:\u003c\/strong\u003e Front and rear high-pass or low-pass filters adjust from 50 Hz to 250 Hz.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh- and Low-Level Inputs:\u003c\/strong\u003e Supports RCA connections or speaker-level signals from compatible factory systems.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe R2-500X4 uses a cast aluminum heat sink with convection cooling and Rockford Fosgate's MEHSA4 heat-sink application. Its compact 1.9-inch-high chassis measures 6.8 inches wide by 10.1 inches deep. Top-mounted controls and compression terminal blocks keep adjustment and connection points accessible when the amplifier is mounted appropriately.\u003c\/p\u003e\u003cp\u003eUse 4 AWG power wiring and an externally mounted 80-amp fuse as specified for the amplifier. The amp supports 4-ohm or 2-ohm stereo speaker loads, while bridged channels require a 4-ohm load; consult the owner’s manual for the correct bridged speaker-terminal connections. For best results, set crossover points and front\/rear gains after the amplifier is wired, then use the C.L.E.A.N. indicators to avoid clipping.\u003c\/p\u003e","brand":"ROCKFORD FOSGATE","offers":[{"title":"Default Title","offer_id":45768081440959,"sku":"R2-500X4","price":233.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/71Pgw6ueFVL.jpg?v=1782271166"},{"product_id":"stx-audio-stx1080-4dbt","title":"STX Audio STX1080.4DBT 4-Channel Class D Amplifier","description":"\u003cp\u003eThe STX Audio STX1080.4DBT is a four-channel full-range Class D amplifier designed to add dedicated power and system flexibility to a vehicle audio setup. It provides four amplified channels for compatible speakers, helping support an upgrade beyond basic factory-source power. Built-in Bluetooth streaming also allows compatible mobile devices to play audio wirelessly through the amplifier.\u003c\/p\u003e\u003cp\u003eThis amplifier is intended for listeners building a speaker-focused system with separate front and rear channels, component speakers, or other compatible full-range speakers. Its rated output is 80 watts RMS per channel at 4 ohms and 130 watts RMS per channel at 2 ohms. That range gives installers options when matching the amplifier to speaker impedance and power requirements.\u003c\/p\u003e\u003cp\u003eFor systems that need fewer channels with greater output, the STX1080.4DBT can be bridged to provide 280 watts RMS by two channels at 4 ohms. This configuration can suit compatible higher-power speaker or subwoofer applications. Proper impedance matching is important when using bridged channels.\u003c\/p\u003e\u003cp\u003eIts Class D architecture is designed for efficient operation, while the full MOSFET circuit design and SMT components support the amplifier's internal construction. Adjustable high-pass and low-pass crossovers allow the signal range sent to connected speakers to be tailored to the system. Built-in protection circuitry is specified to help protect against overload, short circuits, and overheating.\u003c\/p\u003e\u003cp\u003eThe STX1080.4DBT can serve as the amplification center of a straightforward Bluetooth-based audio system or as part of a more customized installation. It is appropriate for users who want four channels of full-range amplification with selectable crossover control and bridged-channel capability. The 1100-watt maximum-power rating describes its stated peak output specification, while RMS ratings are the useful figures for matching speakers.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Amplification:\u003c\/strong\u003e Powers up to four compatible speakers from one amplifier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass D Design:\u003c\/strong\u003e Provides efficient amplification in a compact electronic format.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth Streaming:\u003c\/strong\u003e Plays wireless audio from compatible mobile devices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e80W x 4 RMS at 4 Ohms:\u003c\/strong\u003e Delivers rated full-range power for four-channel speaker systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridgeable Channels:\u003c\/strong\u003e Combines channel pairs for 280W x 2 at 4 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable Crossovers:\u003c\/strong\u003e High-pass and low-pass filters help tailor speaker frequency ranges.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe amplifier is specified with SMT components and a full MOSFET circuit design. Its Class D platform is intended to support efficient operation, while integrated protection circuits address overload, short-circuit, and overheating conditions. Bluetooth functionality is integrated for direct wireless music streaming from compatible devices.\u003c\/p\u003e\u003cp\u003eUse the four channels for compatible full-range speakers, or bridge paired channels only with suitable 4-ohm loads. Set the high-pass or low-pass crossover according to the role of the connected speakers in the system. Installation should include correctly matched speakers, suitable power and ground wiring, signal connections as needed, and careful gain and crossover adjustment.\u003c\/p\u003e","brand":"STX AUDIO","offers":[{"title":"Default Title","offer_id":45771391598783,"sku":"STX1080-4DBT","price":54.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/71xd8YiFALL.jpg?v=1782357577"},{"product_id":"hertz-cp-4800","title":"Hertz CP-4800 4-Channel Class D Car Amplifier","description":"\u003cp\u003eThe Hertz Cento Power CP 4.800 is a compact four-channel Class D car amplifier designed to add clean, controlled power to an upgraded speaker system. It can operate in four-, three-, or two-channel configurations, giving installers flexibility for full-range speakers, an active front stage, or a front-stage-and-subwoofer arrangement. With 110 watts RMS per channel at 4 ohms, it is suited to systems that need substantially more output than a factory radio can provide.\u003c\/p\u003e\u003cp\u003eFor listeners building a detailed daily-driver system, the CP 4.800 supports a wide specified bandwidth from 10 Hz to 47 kHz at -3 dB and carries Hi-Res Audio certification with response stated to 41 kHz. Its Advanced D-Class output stage is rated at 85% efficiency, helping it deliver high output while managing space and electrical demand. The result is a versatile amplifier platform for component speakers, coaxials, or properly matched subwoofer channels.\u003c\/p\u003e\u003cp\u003eThe amplifier accepts both low-level preamp signals and high-level speaker signals, making it useful with aftermarket receivers as well as many factory audio systems. Its speaker-level input sensitivity range is 1.6 to 40 Vrms, while preamp input sensitivity is adjustable from 0.32 to 8 Vrms. Hertz also provides automatic remote turn-on capability from a compatible BTL speaker-level source.\u003c\/p\u003e\u003cp\u003eIndependent front and rear crossover controls allow each channel pair to be configured for full-range, high-pass, or low-pass use. Both front and rear sections offer adjustable high-pass and low-pass filtering from 50 to 4,000 Hz at 12 dB per octave. A 50 Hz bass boost adjustment and rear-channel subwoofer-level control add further system-tuning options.\u003c\/p\u003e\u003cp\u003eThe CP 4.800 is housed in an aluminum die-cast chassis measuring 8.07 by 6.10 by 1.89 inches, helping it fit in constrained installation locations. It includes Plug \u0026amp; Play connection cables for signal and speaker wiring, along with the required 40 A fuse. For systems needing convenient bass-level adjustment, it is compatible with the optional Hertz HRC 02 remote control when the rear low-pass filter is active.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Class D Design:\u003c\/strong\u003e Powers front and rear speakers or supports bridged system layouts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e760-Watt Total RMS Output:\u003c\/strong\u003e Delivers substantial power in a compact amplifier chassis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHi-Res Audio Certification:\u003c\/strong\u003e Supports extended high-frequency reproduction to 41 kHz.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreamp And Speaker-Level Inputs:\u003c\/strong\u003e Works with aftermarket or compatible factory audio sources.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable Front And Rear Crossovers:\u003c\/strong\u003e Helps match each channel pair to its assigned speakers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional HRC 02 Compatibility:\u003c\/strong\u003e Enables rear-channel subwoofer level adjustment from the driver seat.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe CP 4.800 uses a durable aluminum die-cast case with a compact footprint and accessible top-mounted tuning controls. Its chassis measures 205 x 155 x 48 mm, while the specified mounting footprint is 171.5 x 121.5 mm. The amplifier weighs 1.75 kg and uses one 40 A fuse.\u003c\/p\u003e\u003cp\u003eUse either the supplied preamp-input harness or speaker-input harness, not both at the same time. Mount the amplifier securely with adequate ventilation, connect it to a properly fused 12 V vehicle electrical system, and match speaker loads to its rated minimum impedance requirements. A 4 AWG power cable is specified in Hertz's installation guidance; bridged operation requires a 4-ohm load.\u003c\/p\u003e","brand":"HERTZ","offers":[{"title":"Default Title","offer_id":45771448189119,"sku":"CP-4800","price":316.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/61ru9ybinVL_383beb81-bf1b-40e8-824d-e46e271b710e.jpg?v=1782362568"},{"product_id":"hertz-sp4-900","title":"Hertz SP4-900 4-Channel D-Class Car Amplifier","description":"\u003cp\u003eThe Hertz SP4-900 is a compact four-channel car audio amplifier designed to add substantial, configurable power where installation space is limited. It can run four speakers, a front speaker pair with a bridged subwoofer channel, or two bridged speaker\/subwoofer loads. Its IP55-rated enclosure and sealed connections make it especially relevant for vehicles and powersports applications exposed to humidity, vibration, or dust.\u003c\/p\u003e\u003cp\u003eAt 14.4V, the SP4-900 delivers 160 watts RMS to each of four 4-ohm channels or 250 watts RMS per channel at 2 ohms. For systems needing more output from fewer channels, it can be bridged to provide 500 watts RMS x 2 at 4 ohms. This flexibility supports upgrades ranging from amplified component speakers and coaxials to a speaker-and-subwoofer arrangement.\u003c\/p\u003e\u003cp\u003eThe amplifier uses Hertz ADC, an Advanced D-Class output stage specified for up to 85% efficiency. Its published noise, distortion, and damping specifications support a clean, controlled signal path for properly matched speakers. A fanless layout avoids an internal cooling fan, helping reduce the buildup of dirt inside the chassis.\u003c\/p\u003e\u003cp\u003eFactory-system integration is supported through both pre-level and speaker-level inputs. Hertz USS, or Universal Speakers Simulator, is built into the high-level input section to help the amplifier work with head units that monitor connected speaker loads. It also supports remote turn-on through a conventional remote input or DC sensing from compatible BTL speaker outputs.\u003c\/p\u003e\u003cp\u003eIndependent channel-pair crossover controls allow the SP4-900 to be configured for full-range, high-pass, or low-pass operation. Both channel pairs offer 50 Hz to 5 kHz filters with 12 dB-per-octave slopes, while channels 3-4 add adjustable 45 Hz bass boost when low-pass mode is selected. The compact footprint fits under-seat, behind-seat, motorcycle, and other space-conscious installations when mounted with appropriate ventilation.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel D-Class Design:\u003c\/strong\u003e Supplies configurable power for speakers, subwoofers, or mixed systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e160W RMS Per Channel:\u003c\/strong\u003e Delivers rated four-channel output into 4-ohm speakers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-Ohm Stable Channels:\u003c\/strong\u003e Provides up to 250W RMS per channel at 2 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridgeable Outputs:\u003c\/strong\u003e Produces 500W RMS x 2 into 4-ohm loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUSS High-Level Integration:\u003c\/strong\u003e Helps maintain compatibility with speaker-load-detecting factory radios.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIP55 Aluminum Chassis:\u003c\/strong\u003e Adds protection against dust and water ingress.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe SP4-900 uses an aluminum IP55-rated chassis, sealed power, line-input, and speaker-output connections, plus a conformal-coated main board intended to resist harm from internal condensation. A removable aluminum control cover protects the adjustment section, and all crossover controls are grouped on one side for easier access after installation. The fanless design eliminates a cooling fan that could draw dirt into the amplifier.\u003c\/p\u003e\u003cp\u003eInstall the amplifier in a 12V negative-ground vehicle or boat electrical system, using the included power-supply and speaker-output harnesses. Select low-level input mode for pre-out signals or high-level USS mode for speaker-output signals, then choose 2-channel or 4-channel input routing as needed. Mount it in a ventilated location with clearance around the chassis, keep it out of the engine compartment, and observe the rated minimum impedance for the selected channel configuration.\u003c\/p\u003e","brand":"HERTZ","offers":[{"title":"Default Title","offer_id":45771449237695,"sku":"SP4-900","price":404.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/71xVI0Q34WL.jpg?v=1782362614"},{"product_id":"hertz-veneziav4c","title":"Hertz Venezia V4C 4-Channel Compact Marine Amplifier","description":"\u003cp\u003eThe Hertz Venezia V4C is a compact four-channel marine amplifier for upgrading boat audio systems where installation space is limited. It can power four full-range marine speakers, or it can be configured for three- or two-channel operation with bridged outputs. Its 2-ohm-stable channels help support higher-output speaker layouts without requiring a large amplifier chassis.\u003c\/p\u003e\u003cp\u003eAt 14.4 volts, the Venezia V4C delivers 110 watts RMS per channel at 4 ohms or 190 watts RMS per channel at 2 ohms. Bridged channel pairs deliver 380 watts RMS at 4 ohms, allowing the amplifier to run a subwoofer or a dual-mono configuration. This flexibility makes it suitable for systems using marine coaxial speakers, a subwoofer, or both.\u003c\/p\u003e\u003cp\u003eHertz Advanced Class D amplification is designed for efficient power delivery and reduced heat generation. The amplifier has a specified 10 Hz to 42 kHz bandwidth and Hi-Res certification, supporting a wide audio range for detailed playback. Balanced fully differential inputs are used to help reject electromagnetic interference in electrically demanding marine installations.\u003c\/p\u003e\u003cp\u003eThe V4C is engineered for marine use, with an epoxy-coated circuit board, salt-fog testing, and IPX2 certification when mounted vertically with its connections facing downward. Its die-cast aluminum chassis uses fanless convection cooling rather than an onboard fan. Short-circuit, overload, and thermal safeguards reset automatically after protection events.\u003c\/p\u003e\u003cp\u003eFor system building, the amplifier provides independent front and rear filter sections with full-range, high-pass, and low-pass settings. A full-range front pre-out can feed an additional amplifier, while mono input options support simplified source connections. Safe-Lock plug-and-play input, output, and power connections are intended to make a secure marine installation more straightforward.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Class D Output:\u003c\/strong\u003e Delivers 110 watts RMS x 4 at 4 ohms or 190 watts RMS x 4 at 2 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridgeable Channel Pairs:\u003c\/strong\u003e Provides 380 watts RMS x 2 at 4 ohms for bridged applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarine-Ready Construction:\u003c\/strong\u003e Uses an epoxy-coated PCB and is tested for marine environmental exposure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIPX2 Installation Rating:\u003c\/strong\u003e Rated IPX2 when installed vertically with connections facing downward.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable Crossover Network:\u003c\/strong\u003e Front and rear channels offer full-range, high-pass, and low-pass filtering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalanced Differential Inputs:\u003c\/strong\u003e Helps reduce noise from electromagnetic interference in the audio signal path.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe Venezia V4C combines a die-cast aluminum compact chassis with a fanless convection cooling design. A polycarbonate panel protects the built-in filter controls, while the internal electronics use marine-focused corrosion protection. The amplifier weighs 2.62 kg (5.77 lb).\u003c\/p\u003e\u003cp\u003eUse the V4C with a 9 to 16 VDC electrical system and a source unit or processor with preamp outputs. It accepts 2-ohm loads in four-channel operation, while bridged operation requires 4-ohm loads. Mount it vertically with the connections facing down when using its IPX2-rated installation orientation, and configure the front and rear filters to suit full-range speakers, a bridged subwoofer, or a mixed speaker-and-subwoofer system.\u003c\/p\u003e","brand":"HERTZ","offers":[{"title":"Default Title","offer_id":45771450450111,"sku":"VENEZIAV4C","price":424.67,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/61k6nXghxYL.jpg?v=1782362676"},{"product_id":"hertz-veneziav4","title":"Hertz VENEZIA V4 4-Channel Marine Amplifier","description":"\u003cp\u003eThe Hertz VENEZIA V4 is a four-channel marine amplifier designed to supply substantial power to boat and powersports audio systems. It can run four speakers in stereo, combine channels for a three-channel speaker-and-subwoofer layout, or operate as a two-channel bridged amplifier. Its 2-ohm-stable output stage helps support demanding marine speaker systems from a compact chassis.\u003c\/p\u003e\u003cp\u003eAt 4 ohms, the VENEZIA V4 delivers 160 watts RMS to each of four channels, while 2-ohm operation raises output to 290 watts RMS per channel. Bridged configurations provide up to 580 watts RMS per bridged channel at 4 ohms. This flexibility makes it suitable for multi-speaker cockpit systems, tower speakers, or a system that combines stereo speakers with a subwoofer.\u003c\/p\u003e\u003cp\u003eHertz Advanced D-Class amplification is used to combine high output with efficient operation. The amplifier is Hi-Res certified and has a stated bandwidth of 10 Hz to 42 kHz. Balanced fully differential input circuitry is designed to reject electromagnetic noise, an important consideration when audio wiring is installed alongside marine electrical equipment.\u003c\/p\u003e\u003cp\u003eThe VENEZIA V4 is engineered for marine exposure, with an epoxy-coated marine-grade circuit board and testing for UV exposure, salt fog, vibration, temperature extremes, and thermal shock. It carries an IPX2 rating when mounted vertically with its connections facing downward. A fanless convection cooling system is integrated into the cast-aluminum heat-sink chassis.\u003c\/p\u003e\u003cp\u003eSystem tuning is handled through independent A and B channel filter sections, each offering bypass, high-pass, and low-pass operation. The B-channel section also includes adjustable 50 Hz bass boost, while both channel pairs can be switched to mono for bridged use. Safe-Lock input, output, and power connections, plus automatic short-circuit, overload, and thermal protection, support a durable installation.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Class D Output:\u003c\/strong\u003e Delivers 160 watts RMS x 4 at 4 ohms or 290 watts RMS x 4 at 2 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridged-System Flexibility:\u003c\/strong\u003e Supports three-channel and two-channel bridged configurations for speakers and subwoofers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHi-Res Certified Bandwidth:\u003c\/strong\u003e Extends from 10 Hz to 42 kHz for wide-bandwidth playback capability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarine-Ready Electronics:\u003c\/strong\u003e Epoxy-coated circuit boards help resist corrosion in humid and salt-exposed environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndependent Crossover Sections:\u003c\/strong\u003e A and B channel pairs each have selectable bypass, high-pass, and low-pass filtering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic Protection Circuitry:\u003c\/strong\u003e Short-circuit, overload, and thermal safeguards reset automatically after a fault condition clears.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe VENEZIA V4 uses a compact cast-aluminum chassis with an integrated heat sink and fanless convection cooling. Its marine-oriented construction includes conformal-coated circuit boards, Safe-Lock plug-and-play connections, and a polycarbonate cover over the control section. The amplifier is rated IPX2 only when installed vertically with the connections facing downward.\u003c\/p\u003e\u003cp\u003eInstall the amplifier on a solid surface with clearance for heat dissipation and use a 9 to 16 VDC electrical system. Connect a source with preamp outputs to the PRE IN connection, then select the A and B crossover modes to suit the speaker layout. For bridged operation, use only the specified 4-ohm minimum load; the optional Hertz HRC BM2 remote adjusts the BL\/BR speaker outputs when B-channel filter mode is set to low-pass.\u003c\/p\u003e","brand":"HERTZ","offers":[{"title":"Default Title","offer_id":45771450482879,"sku":"VENEZIAV4","price":673.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/61ZplSIR8CL.jpg?v=1782362678"},{"product_id":"hertz-sp4-500","title":"Hertz SP4-500 4-Channel Class D Car Amplifier","description":"\u003cp\u003eThe Hertz SP4-500 is a compact four-channel car audio amplifier designed to add clean, configurable power where installation space is limited. It can operate in 4-, 3-, or 2-channel configurations, allowing it to drive a full speaker system, a front stage plus subwoofer, or bridged speakers or subwoofers. Its compact footprint makes it practical for motorcycles, under-seat vehicle installations, and behind-seat truck mounting locations.\u003c\/p\u003e\u003cp\u003eWith 90 watts RMS per channel at 4 ohms or 150 watts RMS per channel at 2 ohms, the SP4-500 is suited to aftermarket speakers that need more power and control than a factory radio can provide. Bridged operation supplies up to 300 watts RMS per pair at 4 ohms. It also supports a three-channel setup for powering two speakers and one bridged subwoofer channel.\u003c\/p\u003e\u003cp\u003eThe amplifier has a wide 10 Hz to 35 kHz bandwidth, a 100 dBA A-weighted signal-to-noise ratio, and less than 0.02% THD under its stated test conditions. Adjustable high-pass and low-pass filters on both channel pairs help tailor the signal for tweeters, full-range speakers, midbass drivers, or subwoofers. A selectable bass boost for channels 3-4 is available when their low-pass filter is engaged.\u003c\/p\u003e\u003cp\u003eHertz uses its ADC, or Advanced D-Class, output stage to provide efficient operation in a small chassis. The amplifier is rated for up to 85% efficiency and uses an IP55-rated aluminum chassis intended to help protect against humidity and external contaminants. Its sealed power, line-input, and speaker-output connections support installations exposed to vibration or changing conditions.\u003c\/p\u003e\u003cp\u003eThe SP4-500 accepts both preamp-level and speaker-level input signals, making it suitable for aftermarket receivers as well as many factory head units. Hertz USS, or Universal Speaker Simulators, is built into the high-level input section to support source units with speaker-load detection circuitry. The included wire-to-RCA adapters and selectable two- or four-channel input mode provide flexibility when integrating it into a new or existing system.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Flexibility:\u003c\/strong\u003e Operates in 4-, 3-, or 2-channel configurations for multiple system layouts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eADC Class D Output:\u003c\/strong\u003e Delivers compact, efficient amplification with up to 85% rated efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e90W x 4 RMS:\u003c\/strong\u003e Supplies rated power at 4 ohms for aftermarket full-range speakers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Level Input With USS:\u003c\/strong\u003e Integrates with compatible factory radios using speaker-level signals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable Crossovers:\u003c\/strong\u003e High-pass and low-pass filters help match channels to speaker roles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIP55 Aluminum Chassis:\u003c\/strong\u003e Provides a compact enclosure designed for humid and demanding installations.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe SP4-500 uses an IP55-rated aluminum chassis with a compact 192.7 x 130 x 49 mm footprint. Hertz specifies sealed power-cord, line-input, and speaker-output connections to help limit oxidation at connection points. The amplifier does not use an internal cooling fan, helping avoid internal dirt accumulation.\u003c\/p\u003e\u003cp\u003eInstall the amplifier in a dry, ventilated location within its stated 0°C to 55°C operating range, allowing clearance around the chassis for airflow. Use the supplied power and speaker-output harnesses, select either preamp or speaker-level input as appropriate, and set the input mode for two- or four-channel source signals. A 30A fuse is recommended on the power-supply line, positioned close to the battery positive terminal.\u003c\/p\u003e","brand":"HERTZ","offers":[{"title":"Default Title","offer_id":45771452612799,"sku":"SP4-500","price":275.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/71ceIedBoRL.jpg?v=1782362737"},{"product_id":"hertz-dp4-400","title":"Hertz DP 4.400 4-Channel Class AB Car Amplifier","description":"\u003cp\u003eThe Hertz DP 4.400 is a four-channel Class AB car amplifier designed to add clean, configurable power to factory or aftermarket audio systems. It provides 75 watts RMS to each of four channels at 4 ohms, making it well suited to powering upgraded front and rear speakers. Its bridgeable design also allows it to support systems that combine stereo speakers with higher-power channels.\u003c\/p\u003e\u003cp\u003eThis amplifier is a practical option for listeners who want greater output and control than a head unit can provide without moving to a large amplifier chassis. It is stable down to 2 ohms per channel in four-channel operation and can be configured for four-, three-, or two-channel use. That flexibility supports a range of speaker layouts as a system grows.\u003c\/p\u003e\u003cp\u003eThe DP 4.400 uses a Class AB output stage with a specified 10 Hz to 45 kHz bandwidth at -3 dB, along with Hi-Res Audio certification covering 10 Hz to 50 kHz. Its 0.01% THD specification at 100 Hz and 70% rated power, 101 dBA signal-to-noise ratio, and balanced input circuitry are intended to support low-noise signal transfer. The result is an amplifier built for detailed full-range speaker amplification rather than subwoofer-only duty.\u003c\/p\u003e\u003cp\u003eInstallation options include RCA preamp inputs for aftermarket radios and speaker-level inputs for integration with many OEM systems. The built-in Universal Speaker Simulator helps maintain compatibility with source units that monitor speaker load, while ART automatic remote turn-on can activate the amplifier from compatible BTL speaker-level signals. A full-range front pre-out can also feed an additional amplifier.\u003c\/p\u003e\u003cp\u003eIndependent front and rear high-pass and low-pass filter sections allow the DP 4.400 to be tailored for full-range speakers, component systems, or mixed amplified systems. Each filter section adjusts from 50 Hz to 4,000 Hz with a 12 dB\/octave slope, and the rear section includes selectable 50 Hz bass boost. Its compact footprint, protected controls, and solid terminal arrangement make it a capable foundation for a carefully planned vehicle audio upgrade.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Class AB Power:\u003c\/strong\u003e Delivers 75 watts RMS per channel at 4 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-Ohm Stable Outputs:\u003c\/strong\u003e Supports 105 watts RMS per channel at 2 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridgeable Channel Design:\u003c\/strong\u003e Provides up to 210 watts RMS per bridged pair.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHi-Res Audio Certified:\u003c\/strong\u003e Supports a certified 10 Hz to 50 kHz response range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM and Aftermarket Inputs:\u003c\/strong\u003e Includes RCA pre-in and speaker-level input connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable Crossovers:\u003c\/strong\u003e High- and low-pass filters help match speakers and system roles.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe DP 4.400 uses a compact chassis with a removable top panel that protects its controls and connections. It features a status LED and machined terminal blocks for power and speaker wiring. The amplifier measures 335 x 190 x 50 mm and weighs 2.88 kg.\u003c\/p\u003e\u003cp\u003eUse RCA pre-in connections with an aftermarket head unit, or use the speaker-level inputs when retaining a compatible factory radio. Configure each channel pair with its level control and high-pass, low-pass, or full-range setting before finalizing speaker wiring. For bridged operation, use 4-ohm speaker loads and follow the terminal markings and instructions in the supplied documentation.\u003c\/p\u003e","brand":"HERTZ","offers":[{"title":"Default Title","offer_id":45771453137087,"sku":"DP4-400","price":220.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/71iBcWt6xrL.jpg?v=1782362764"},{"product_id":"audison-afm4d","title":"Audison AF M4D 4-Channel Class D Amplifier","description":"\u003cp\u003eThe Audison AF M4D is a four-channel Class D car amplifier designed to add clean, substantial power to a processor-based audio system. It delivers 160 watts RMS to each of four 4-ohm channels, making it suitable for actively powered front stages, component speakers, or front-and-rear speaker systems. Its compact footprint helps bring higher-output amplification to installations where available mounting space is limited.\u003c\/p\u003e\u003cp\u003eThis amplifier is intended for enthusiasts building a system around an Audison Forza AF bit amplifier or a standalone signal processor. Its straight-wire architecture omits onboard analog crossover controls, allowing the external processor to manage crossover points, equalization, time alignment, and routing. That approach makes the AF M4D especially appropriate for precisely tuned active systems.\u003c\/p\u003e\u003cp\u003eAt 2 ohms, the AF M4D provides 260 watts RMS per channel, while each channel pair can be bridged to supply 520 watts RMS at 4 ohms. This gives installers flexibility to power four speakers individually or use two bridged channels for higher-power applications. Minimum impedance is 2 ohms in four-channel operation and 4 ohms when bridged.\u003c\/p\u003e\u003cp\u003eAudison D-Class technology uses higher switching frequency operation and a fourth-order analog low-pass filter design. The amplifier has a 10 Hz to 42 kHz bandwidth and is specified for Hi-Res compatibility through its extended high-frequency response. With 83% efficiency, it is engineered to deliver its rated output while managing power use in a compact amplifier format.\u003c\/p\u003e\u003cp\u003eBoth low-level preamp and high-level speaker inputs are provided for integration with aftermarket or factory audio sources. The high-level input section includes Audison Universal Speaker Simulator technology for compatibility with OEM head units. A supplied signal-input harness supports connection with compatible AF bit amplifiers, while an optional AF Link cable can connect AF bit DSP outputs to the amplifier's pre-in inputs.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel RMS Power:\u003c\/strong\u003e Delivers 160 watts RMS per channel at 4 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-Ohm Stable Operation:\u003c\/strong\u003e Produces 260 watts RMS per channel at 2 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridgeable Channel Pairs:\u003c\/strong\u003e Supplies 520 watts RMS x 2 at 4 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtended Bandwidth:\u003c\/strong\u003e Covers 10 Hz to 42 kHz for wide-range playback.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProcessor-Oriented Architecture:\u003c\/strong\u003e Works with external DSP crossover and tuning controls.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh- And Low-Level Inputs:\u003c\/strong\u003e Integrates with factory or aftermarket source units.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe AF M4D uses a compact Class D amplifier chassis measuring 240 x 156 x 47 mm and weighing 2.04 kg. Its design centers on externally managed signal processing rather than onboard analog filters. The amplifier includes two 30-amp fuses and is specified for 83% efficiency.\u003c\/p\u003e\u003cp\u003eUse the pre-in connection with an aftermarket source or DSP pre-outs, or use the speaker-in connection when retaining a factory head unit. Plan the system with an external processor when crossover filtering, equalization, or time alignment is needed, because the AF M4D does not include an adjustable crossover. For bridged use, connect only a 4-ohm load to channel pairs 1\/2 or 3\/4 and follow the manufacturer's wiring guidance.\u003c\/p\u003e","brand":"AUDISON","offers":[{"title":"Default Title","offer_id":45771454349503,"sku":"AFM4D","price":580.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/61zaedmKIcL.jpg?v=1782363022"},{"product_id":"audison-afc4-10bit","title":"Audison AF C4.10 bit 4-Channel DSP Amplifier","description":"\u003cp\u003eThe Audison AF C4.10 bit is a compact four-channel car amplifier with an integrated 10-channel DSP platform. It is designed for systems that need both clean amplification and detailed signal tuning from one chassis. Four amplified channels power speakers directly, while six DSP-controlled preamp outputs support expansion with external amplifiers.\u003c\/p\u003e\u003cp\u003eRated at 90 watts RMS per channel at 4 ohms, the AF C4.10 bit is suited to actively powered front stages, upgraded door speakers, and multi-speaker OEM integration projects. It can also deliver 150 watts RMS per channel at 2 ohms. For higher-output applications, channel pairs may be bridged for 300 watts RMS x 2 at 4 ohms.\u003c\/p\u003e\u003cp\u003eThe built-in DSP operates at 24-bit\/96 kHz and supports an extended audio band reaching 40 kHz. Its processing tools include crossover filtering, equalization, time alignment, phase control, and real-time audio monitoring. This gives an installer the flexibility to tailor the system for vehicle acoustics and speaker placement.\u003c\/p\u003e\u003cp\u003eAudison D-Class amplification combines compact packaging with a rated 81% efficiency at rated power. The amplifier has a 10 Hz to 42 kHz bandwidth and a 0.03% THD figure at 1 kHz, 4 ohms, and 70% rated power. Its 600-watt total RMS capability provides useful headroom for a carefully matched speaker system.\u003c\/p\u003e\u003cp\u003eIntegration options include eight high-level inputs, eight low-level inputs, a TOSLINK optical S\/PDIF input, and six DSP preamp outputs. The high-level inputs support installation with many factory audio systems, while the optical input accepts stereo PCM signals up to 192 kHz\/24-bit. Optional expansion modules can add four high-level inputs or a second optical\/coaxial digital input.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel D-Class Amplifier:\u003c\/strong\u003e Delivers 90 watts RMS x 4 at 4 ohms or 150 watts RMS x 4 at 2 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10-Channel DSP Platform:\u003c\/strong\u003e Combines four amplified outputs with six DSP-controlled preamp outputs for system expansion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridgeable Channel Pairs:\u003c\/strong\u003e Pairs channels 1\/2 and 3\/4 for 300 watts RMS x 2 at 4 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e24-Bit\/96 kHz Processing:\u003c\/strong\u003e Provides high-resolution DSP processing with an audio band extending to 40 kHz.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Signal Integration:\u003c\/strong\u003e Accepts speaker-level, RCA preamp-level, and optical S\/PDIF source signals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdvanced Tuning Controls:\u003c\/strong\u003e Includes EQ, crossover, time alignment, phase adjustment, and RTA monitoring tools.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe AF C4.10 bit uses a compact D-Class platform measuring 200 x 134 x 47 mm and weighing 1.38 kg. Its integrated DSP and amplifier architecture helps reduce the number of separate components required in a tuned audio system. A built-in status logo indicates operating and protection conditions.\u003c\/p\u003e\u003cp\u003eProfessional installation is recommended because the amplifier requires correct power, ground, speaker, and source wiring as well as DSP configuration through Audison bit Drive software. Use it as a four-channel active amplifier, bridge it for a two-channel higher-power setup, or add external amplification through the six-channel DSP output. It includes cables for USB connection, control, DSP output, speaker output, preamp input, and speaker-level input.\u003c\/p\u003e","brand":"AUDISON","offers":[{"title":"Default Title","offer_id":45771454382271,"sku":"AFC4-10BIT","price":759.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/615CVrN67tL.jpg?v=1782363024"},{"product_id":"audison-sr4-500","title":"Audison SR4-500 4-Channel Class D Amplifier","description":"\u003cp\u003eThe Audison SR4-500 is a compact four-channel Class D car amplifier designed to add substantial, configurable power to an upgraded speaker system. It can drive four speakers, operate as a three-channel amplifier with a bridged subwoofer channel, or run as a powerful two-channel amplifier. This flexibility makes it suitable for front-and-rear speaker upgrades, active systems, and front-stage-plus-subwoofer installations.\u003c\/p\u003e\u003cp\u003eAt 14.4 VDC and 1% THD, the SR4-500 is rated for 130 watts RMS per channel at 4 ohms or 220 watts RMS per channel at 2 ohms. Each channel pair can be bridged, with a two-channel configuration rated at 450 watts RMS per channel into 4 ohms. Its 2-ohm-stable four-channel output stage supports efficient use with many aftermarket speaker systems.\u003c\/p\u003e\u003cp\u003eThe amplifier accepts both RCA preamp signals and high-level speaker signals, helping it integrate with either an aftermarket receiver or a factory audio system. Balanced high-level inputs and the built-in Universal Speaker Simulator support connection to OEM source units. Selectable ART automatic remote turn-on can switch the amplifier on from compatible speaker-level signals.\u003c\/p\u003e\u003cp\u003eAudison D-Class Technology is used to keep the chassis compact while providing wide bandwidth, low measured distortion, and a 200 damping factor specification. The SR4-500 includes separate adjustable crossover controls for its front and rear channel sections. This allows the amplifier to be configured for full-range speakers, high-pass speakers, low-pass use, or a mixed speaker-and-subwoofer system.\u003c\/p\u003e\u003cp\u003eThe extruded aluminum chassis uses rounded corners and passive convection cooling rather than an internal fan. Its controls are positioned on the top panel beneath a satin-finished aluminum cover for access after installation. A full-range pre-out supports adding another amplifier, while the optional VCR-S2 remote control can adjust the B-channel level for systems using that channel section for bass.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Class D Output:\u003c\/strong\u003e Delivers 130 W RMS x 4 at 4 ohms or 220 W RMS x 4 at 2 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridgeable Channel Pairs:\u003c\/strong\u003e Supports two-channel operation at 450 W RMS x 2 into 4 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh- And Low-Level Inputs:\u003c\/strong\u003e Connects to factory speaker outputs or RCA-equipped aftermarket sources.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable Crossovers:\u003c\/strong\u003e Configures front and rear channels for full-range, high-pass, or low-pass operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eART Remote Turn-On:\u003c\/strong\u003e Selectable automatic turn-on works from compatible speaker-level input signals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact Fanless Chassis:\u003c\/strong\u003e Extruded aluminum construction uses passive convection cooling without an internal fan.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe SR4-500 uses an extruded aluminum enclosure with rounded corners, a top-mounted control section, and heat sinks on the short sides. Its maximum dimensions are 264 x 155 x 47.5 mm, allowing installation where a larger traditional amplifier may be difficult to place. Passive cooling avoids the noise and dust accumulation associated with internal cooling fans.\u003c\/p\u003e\u003cp\u003eUse RCA Pre-In connections with an aftermarket receiver or processor, or use the Speaker-In connections when retaining a compatible factory head unit. Match speaker impedance to the selected configuration: the amplifier supports 2 ohms per channel in four-channel mode and requires 4 ohms for bridged pairs. For a front-plus-subwoofer layout, channels can be configured in three-channel mode, and the B-channel bass boost and optional VCR-S2 control can be used where appropriate.\u003c\/p\u003e","brand":"AUDISON","offers":[{"title":"Default Title","offer_id":45771455529151,"sku":"SR4-500","price":322.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/71MThjLFl1L.jpg?v=1782363090"},{"product_id":"jvc-ks-dr2004d","title":"JVC KS-DR2004D 4-Channel Compact Digital Amplifier","description":"\u003cp\u003eThe JVC KS-DR2004D is a compact four-channel digital amplifier designed to add power to car, marine, UTV, and motorcycle audio systems. It provides 50 watts RMS to each of four channels at 4 ohms, making it suited to driving front and rear speakers from an aftermarket or factory audio source. Its compact sealed design helps make installation practical where conventional amplifiers may be difficult to place.\u003c\/p\u003e\u003cp\u003eThis amplifier is intended for systems exposed to water, dust, vibration, and changing outdoor conditions. It is rated IP66 and IP67 for water and dust protection, and its sealed cast-aluminum chassis uses stainless-steel screws. A drain-tunnel structure creates clearance beneath the amplifier to help reduce saltwater and sand buildup at the mounting surface.\u003c\/p\u003e\u003cp\u003eFor audio performance, the KS-DR2004D supports a 10 Hz to 35 kHz frequency response and adjustable high-pass and low-pass filters for each channel pair. The filters are variable from 50 Hz to 200 Hz with a 12 dB-per-octave slope, allowing the amplifier to be set up for full-range speakers or more focused frequency duties. Input sensitivity is adjustable across a 0.2V to 5.0V RCA range for integration with compatible source units.\u003c\/p\u003e\u003cp\u003eThe amplifier can be connected through RCA inputs or speaker-level input wiring for systems using a factory-installed head unit without RCA preouts. Its input-mode and output-mode controls support different system layouts, including four-channel operation and bridged two-channel operation. In bridged mode, it is rated to deliver 150 watts by two channels into 4-ohm loads.\u003c\/p\u003e\u003cp\u003eJVC equips the KS-DR2004D with Polymer Multi-Layer Capacitors and magnetically shielded output coils to support controlled signal handling and reduce radiated noise. The amplifier also includes a protection function for conditions such as speaker-wire shorts, low speaker impedance, DC at the speaker output, and high internal temperature. It is a practical option for powering a compact multi-speaker system in vehicles and powersports applications that need a sealed amplifier chassis.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Power:\u003c\/strong\u003e Supplies 50W RMS x 4 at 4 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridged Capability:\u003c\/strong\u003e Supports 150W x 2 into 4-ohm loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIP66\/IP67 Protection:\u003c\/strong\u003e Built for water and dust exposure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Crossovers:\u003c\/strong\u003e Adjustable HPF and LPF run from 50Hz to 200Hz.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFactory Radio Compatibility:\u003c\/strong\u003e Accepts RCA or speaker-level input signals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSealed Aluminum Chassis:\u003c\/strong\u003e Uses corrosion-resistant construction and stainless-steel screws.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe KS-DR2004D uses a sealed cast-aluminum chassis with stainless-steel screws, a die-cast mounting section, and a drain-tunnel structure beneath the amplifier. JVC specifies IP66 and IP67 water- and dust-protection ratings, ASTM B117 salt-spray corrosion testing, and a 3-axis multi-frequency vibration test. Its 198 x 48.5 x 104 mm enclosure is designed for compact mounting locations.\u003c\/p\u003e\u003cp\u003eInstallation requires a 12V negative-ground electrical system, battery and ground wiring, speaker wiring, and either RCA or speaker-level signal connections. The manual shows 10 AWG battery and ground wiring, a 16 AWG power-control wire for RCA-input installations, and a 40A fuse; use a protective fuse near the battery. Mount the amplifier securely in a location with ventilation, keep the dressing panel properly installed to maintain its protection rating, and have mounting and wiring performed by an experienced installer when needed.\u003c\/p\u003e","brand":"JVC","offers":[{"title":"Default Title","offer_id":45776274194623,"sku":"KS-DR2004D","price":182.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/71dMbss4OuL.jpg?v=1782489718"},{"product_id":"jvc-ks-dr2104dbt","title":"JVC KS-DR2104DBT 4-Channel Bluetooth Marine Amplifier","description":"\u003cp\u003eThe JVC KS-DR2104DBT is a compact four-channel digital amplifier designed for cars, boats, UTVs, ATVs, and motorcycles. It adds dedicated amplification for speakers while also allowing Bluetooth audio streaming directly from a compatible mobile device. Its compact dimensions make it practical where conventional amplifier space is limited.\u003c\/p\u003e\u003cp\u003eAt 4 ohms, the amplifier delivers 50 watts RMS to each of four channels across the full rated 20 Hz to 20 kHz range. It can also run at 75 watts RMS per channel into 2 ohms, or be bridged for two-channel operation at 150 watts RMS per channel into 4 ohms. This flexibility supports four-speaker systems, compact powersports builds, or bridged two-channel applications.\u003c\/p\u003e\u003cp\u003eBluetooth 5.0 is integrated through the included waterproof remote control, which houses the Bluetooth antenna. The system supports A2DP and AVRCP profiles along with aptX, AAC, and SBC codecs. The remote provides volume adjustment, playback control, track skip, pairing, preset EQ selection, and pre-out level control.\u003c\/p\u003e\u003cp\u003eBuilt for exposed installations, the KS-DR2104DBT carries IP66 and IP67 water- and dust-protection ratings. Its sealed cast-aluminum chassis, stainless-steel screws, drain tunnel structure, and ASTM B117 salt-spray corrosion testing address marine and off-road conditions. JVC also specifies a 3-axis multi-frequency vibration test for the amplifier.\u003c\/p\u003e\u003cp\u003eSystem tuning is handled with separate variable high-pass and low-pass filters for channels 1-2 and 3-4, plus a fader control and output-mode switch. A 5V maximum pre-out can pass Bluetooth playback to another component. This makes the amplifier suitable as the foundation of a compact amplified speaker system or as part of a larger multi-amplifier installation.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Amplification:\u003c\/strong\u003e Delivers 50W RMS x 4 at 4 ohms for amplified speaker systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridgeable Output:\u003c\/strong\u003e Supports 150W RMS x 2 at 4 ohms for two-channel configurations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth 5.0 Streaming:\u003c\/strong\u003e Streams audio directly from compatible Bluetooth devices without a separate receiver.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWaterproof Remote Control:\u003c\/strong\u003e Provides volume, track, EQ, pairing, and pre-out controls remotely.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Crossovers:\u003c\/strong\u003e Adjustable HPF and LPF settings help match the amplifier to connected speakers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIP66\/IP67 Protection:\u003c\/strong\u003e Helps protect the amplifier from dust, water jets, and defined immersion conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe KS-DR2104DBT uses a corrosion-resistant sealed cast-aluminum chassis with stainless-steel screws. Its drain tunnel structure spaces the amplifier away from the mounting surface to help reduce saltwater and sand accumulation. The mounting section uses die-cast material, while a heat-transfer sheet and aluminum heat sink are used in its vibration-focused construction.\u003c\/p\u003e\u003cp\u003eInstallation requires a 12V DC negative-ground electrical system, battery and ground wiring, a power-control connection, speaker wiring, and the supplied remote-control installation. JVC specifies AWG 10 battery and ground wiring, AWG 16 power-control wiring, and a 40A fuse. Keep the dressing panel securely attached to maintain the stated water- and dust-protection performance, and use speaker loads within the stated impedance limits.\u003c\/p\u003e","brand":"JVC","offers":[{"title":"Default Title","offer_id":45776274358463,"sku":"KS-DR2104DBT","price":166.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/71RkkAN5sXL.jpg?v=1782489721"},{"product_id":"hifonics-zg-600-4","title":"Hifonics ZG-600-4 Zeus Gamma 4-Channel Car Amplifier","description":"\u003cp\u003eThe Hifonics ZG-600.4 Zeus Gamma is a four-channel Class A\/B car amplifier designed to add dedicated power to an aftermarket speaker system. It supplies four channels for front and rear speakers, making it suited to drivers who want more output and control than a head unit can provide. Its full-range, bridgeable configuration also supports flexible system planning.\u003c\/p\u003e\u003cp\u003eAt 4 ohms, the amplifier is rated at 75 watts per channel across four channels. It is also rated for 150 watts per channel at 2 ohms, allowing it to match many aftermarket speaker configurations. For systems that need fewer, more powerful channels, it can be bridged to provide 300 watts across two 4-ohm channels.\u003c\/p\u003e\u003cp\u003eThe ZG-600.4 covers a 10 Hz to 22 kHz frequency response, supporting both low-frequency extension and high-frequency detail within a full-range system. Variable high-pass and low-pass crossovers help direct the appropriate frequency range to connected speakers. A built-in bass control and adjustable bass boost provide additional low-frequency tuning options.\u003c\/p\u003e\u003cp\u003eIts Class A\/B amplifier design is paired with a PWM MOSFET power supply for stable power conversion. The amplifier uses an aluminum heat sink to help manage operating heat during use. Nickel-plated RCA inputs, speaker-level inputs, and angled terminals support common aftermarket integration methods.\u003c\/p\u003e\u003cp\u003eThis amplifier can serve as the foundation of a four-speaker upgrade or as a two-channel bridged amplifier for compatible 4-ohm loads. Use it with a properly matched vehicle electrical installation, fused power wiring, and speakers that can handle its rated output. Its crossover controls make it practical for running full-range speakers, component systems, or selected bridged applications.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Output:\u003c\/strong\u003e Powers front and rear speakers from one amplifier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e75W x 4 at 4 Ohms:\u003c\/strong\u003e Provides rated four-channel output for compatible speakers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-Ohm Capability:\u003c\/strong\u003e Delivers up to 150 watts per channel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridgeable Channels:\u003c\/strong\u003e Configures as two 300-watt channels at 4 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Crossovers:\u003c\/strong\u003e Helps tailor high-pass or low-pass frequency routing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeaker-Level Inputs:\u003c\/strong\u003e Supports integration with compatible factory audio systems.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe ZG-600.4 uses an aluminum heat sink, PWM MOSFET power supply, nickel-plated RCA inputs, and angled connection terminals. Its Class A\/B design is intended for four-channel, full-range car-audio operation. The compact chassis measures 10.25 inches long, 8.25 inches wide, and 2.375 inches high.\u003c\/p\u003e\u003cp\u003eMount the amplifier to a secure location with adequate ventilation and keep power, signal, and speaker wiring properly routed. Use 4 AWG power and ground connections, a 40A fuse, and up to 12 AWG speaker wire as specified. Set gain and crossover controls to suit the connected speakers, and use only 4-ohm loads when bridging channels.\u003c\/p\u003e","brand":"HIFONICS","offers":[{"title":"Default Title","offer_id":45776292282559,"sku":"ZG-600-4","price":79.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/515pLaEfLlL.jpg?v=1782490314"},{"product_id":"hifonics-hcm800-4d","title":"Hifonics HCM-800.4D 800W 4-Channel Class-D Amplifier","description":"\u003cp\u003eThe Hifonics Colossus Mini HCM-800.4D is a compact four-channel car audio amplifier designed to add dedicated power where installation room is limited. It is suited to cars, motorcycles, and UTVs that need a small-footprint amplifier for front and rear speakers or a mixed stereo-and-subwoofer setup. Its full-range Class-D design supports a broad range of speaker applications.\u003c\/p\u003e\u003cp\u003eRated at 100 watts per channel at 4 ohms and 200 watts per channel at 2 ohms, the HCM-800.4D can provide substantially more output than a typical radio's built-in amplifier. It can also be bridged into two channels at 4 ohms for applications requiring more power per channel. Variable high-pass and low-pass crossovers help tailor the signal to the speakers connected.\u003c\/p\u003e\u003cp\u003eThe amplifier uses a mass-loaded extruded aluminum heat sink to manage heat without fan cooling. Ultra-Fi MOSFET output devices and a full-range Class-D chipset support efficient operation in a compact chassis. Its published frequency response is 10Hz to 25kHz, making it suitable for full-range speaker amplification.\u003c\/p\u003e\u003cp\u003eInstallation flexibility comes from speaker-level inputs as well as nickel-plated RCA inputs. The input-level range of 0.2V to 5V accommodates many aftermarket and factory-source integration approaches. A delayed turn-on circuit is designed to reduce turn-on and turn-off noise with compatible source units.\u003c\/p\u003e\u003cp\u003eThe HCM-800.4D fits well as the speaker amplifier in a complete upgraded system, including systems that use a separate mono amplifier for subwoofers. It can run four speakers in stereo or operate in a two-channel bridged arrangement when matched to proper 4-ohm loads. A supplied bass remote provides adjustment relative to the amplifier's bass-control setting.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Class-D Design:\u003c\/strong\u003e Powers four speakers efficiently from a compact amplifier chassis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e800-Watt Maximum Output:\u003c\/strong\u003e Delivers up to 4 x 200 watts at 2 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridgeable Channels:\u003c\/strong\u003e Supports two-channel bridged operation with 4-ohm speaker loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Electronic Crossovers:\u003c\/strong\u003e Helps direct appropriate frequency ranges to connected speakers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh- and Low-Level Inputs:\u003c\/strong\u003e Works with RCA outputs or speaker-level source signals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTriple Protection Circuits:\u003c\/strong\u003e Provides over\/under-voltage, short-circuit, and thermal protection.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe HCM-800.4D has a black, compact chassis with a mass-loaded extruded aluminum heat sink and CNC-machined aluminum Hifonics and Colossus badging. Its multi-layer PCB and surface-mount construction reduce component count, while molded angled power, ground, and speaker terminals support a cleaner wiring profile. The amplifier does not use fan cooling.\u003c\/p\u003e\u003cp\u003eMount the amplifier securely in a location with adequate ventilation and use the recommended cable and fuse provisions. Hifonics specifies 4 AWG power and ground terminals, 12 AWG speaker terminals, and an external 80A fuse for this model. Use RCA or speaker-level input as appropriate, configure the crossover for the connected speakers, and do not bridge the amplifier below a 4-ohm load.\u003c\/p\u003e","brand":"HIFONICS","offers":[{"title":"Default Title","offer_id":45776294936767,"sku":"HCM800-4D","price":144.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/615bbAFrxLL.jpg?v=1782490353"},{"product_id":"hifonics-bxx1200-4","title":"Hifonics BXX1200.4 4-Channel A\/B Car Amplifier","description":"\u003cp\u003eThe Hifonics BXX1200.4 is a four-channel Brutus Series car audio amplifier built to add dedicated power to a vehicle speaker system. It is designed for users upgrading beyond head-unit power and needing separate amplification for front and rear speakers. Its Super Class A\/B platform supports stereo operation across four channels or bridged operation across two channels.\u003c\/p\u003e\u003cp\u003eAt 4 ohms, the amplifier is rated for 150 watts RMS per channel, making it suitable for appropriately rated full-range speakers. At 2 ohms, it is rated for 300 watts RMS per channel for systems designed around lower-impedance loads. Two pairs of channels can also be bridged to provide 600 watts RMS per bridged channel at 4 ohms.\u003c\/p\u003e\u003cp\u003eThe BXX1200.4 provides adjustable filtering to help match amplifier output to the speakers being used. Its selectable full-range, high-pass, and low-pass crossover functions allow system builders to limit unwanted frequencies where appropriate. A variable bass boost and subsonic filter provide further tuning options for compatible system layouts.\u003c\/p\u003e\u003cp\u003eRCA inputs connect the amplifier to a source unit with preamp outputs, while RCA outputs support signal pass-through to additional amplification. Low-noise preamplifier circuitry and nickel-plated RCA connections are designed to support a clean signal path. A wired bass-level remote is included for accessible level adjustment.\u003c\/p\u003e\u003cp\u003eThis amplifier fits well in a multi-speaker upgrade, including four-channel door-speaker systems or mixed systems using bridged channels for compatible 4-ohm loads. Its 2-ohm stereo stability gives installers flexibility when selecting speakers and wiring configurations. Protection circuitry, status LEDs, and an aluminum alloy heat sink support monitored operation in an automotive installation.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Architecture:\u003c\/strong\u003e Powers four speakers in stereo or two bridged channels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1200W RMS Total Output:\u003c\/strong\u003e Delivers 4 x 300 watts RMS at 2 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridged Capability:\u003c\/strong\u003e Provides 600 watts RMS x 2 at 4 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Crossovers:\u003c\/strong\u003e Helps tailor frequency output to the connected speakers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWired Bass Remote:\u003c\/strong\u003e Allows convenient bass-level adjustment from the listening position.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection Circuitry:\u003c\/strong\u003e Monitors thermal, overload, and speaker-short conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe BXX1200.4 uses a heavy-duty aluminum alloy heat sink to manage heat in its Super Class A\/B design. Nickel-plated RCA input connections are intended to resist corrosion, while green power and red protect LEDs provide operating-status indication. The amplifier has 4 AWG power and ground terminals, 12 AWG speaker terminals, and two onboard 35A fuses.\u003c\/p\u003e\u003cp\u003eInstall the amplifier securely in a dry, ventilated location with clearance around the heat sink. Connect it to a properly fused 12-volt vehicle electrical system, a solid chassis ground, RCA-level source output, and speakers wired within its listed impedance ratings. Use high-pass filtering for many full-range speaker installations, and use bridged channels only with a 4-ohm load.\u003c\/p\u003e","brand":"HIFONICS","offers":[{"title":"Default Title","offer_id":45776296411327,"sku":"BXX1200-4","price":90.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/71V3x8DlxFL_4d1b91cb-6707-44c4-a683-e93685e15e9b.jpg?v=1782490384"},{"product_id":"hifonics-bxx800-4","title":"Hifonics BXX800.4 4-Channel Class AB Car Audio Amplifier","description":"\u003cp\u003eThe Hifonics BXX800.4 is a four-channel Class AB car audio amplifier designed to add dedicated power to aftermarket speakers. It can be used to drive a full set of front and rear speakers, or configured in bridged pairs for higher-output applications. Its 2-ohm stereo stability provides flexibility when matching compatible speakers.\u003c\/p\u003e\u003cp\u003eThis amplifier is suited to vehicle owners upgrading beyond head-unit power and seeking more control over speaker output. It provides 100 watts RMS per channel at 4 ohms or 200 watts RMS per channel at 2 ohms. For bridged use, it is rated at 400 watts RMS per pair into 4 ohms.\u003c\/p\u003e\u003cp\u003eThe BXX800.4 uses a Class AB output stage with a MOSFET power supply and Ultra-Fi MOSFET output devices. This architecture is paired with an aluminum heat sink to help manage heat during operation. Three-way protection circuitry and illuminated status indicators assist with monitoring overload and speaker-short conditions.\u003c\/p\u003e\u003cp\u003eSeparate crossover controls for channel pairs 1\/2 and 3\/4 allow the amplifier to be tailored to full-range speakers, component systems, or selected bridged applications. Each channel pair offers selectable high-pass, full-range, and low-pass operation. Adjustable high-pass and low-pass filters, plus bass boost, support practical system tuning.\u003c\/p\u003e\u003cp\u003eRCA inputs accommodate a compatible aftermarket receiver or other source with preamp outputs, while RCA outputs allow signal pass-through to another amplifier. A 2-channel or 4-channel input mode supports systems with either two or four input channels. This makes the BXX800.4 a practical foundation for a multi-speaker vehicle-audio upgrade.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Output:\u003c\/strong\u003e Powers four speakers or two bridged channel pairs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass AB Design:\u003c\/strong\u003e Uses a Class AB amplifier topology and MOSFET circuitry.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-Ohm Stereo Stability:\u003c\/strong\u003e Delivers up to 200 watts RMS per channel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelectable Crossovers:\u003c\/strong\u003e Separately tunes channels 1\/2 and 3\/4.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRCA Signal Connections:\u003c\/strong\u003e Includes RCA inputs and pass-through RCA outputs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection Monitoring:\u003c\/strong\u003e Uses protection circuitry with power and protect indicators.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe BXX800.4 has an aluminum heat sink intended to reduce heat buildup, plus molded and angled connection areas for cable access. Nickel-plated RCA jacks are used for the low-level signal connections. LED power and protect indicators are located on the amplifier for basic system-status monitoring.\u003c\/p\u003e\u003cp\u003eInstall the amplifier in a secure, dry, ventilated location and use power and ground cable up to 4 AWG at its terminals. Speaker terminals accept wire up to 12 AWG, and the amplifier uses two onboard 25A fuses. Match speakers to the rated impedance, use a 4-ohm load for bridged channel pairs, and set gain and crossover controls after all wiring is complete.\u003c\/p\u003e","brand":"HIFONICS","offers":[{"title":"Default Title","offer_id":45776296968383,"sku":"BXX800-4","price":85.93,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/71qD48IAnbL.jpg?v=1782490412"},{"product_id":"hifonics-zd-1350-4d","title":"Hifonics ZD-1350.4D 4-Channel Class D Car Amplifier","description":"\u003cp\u003eThe Hifonics ZD-1350.4D is a compact four-channel Class D mobile amplifier designed to add external amplification to a vehicle audio system. It can be used to power front and rear speakers independently or configured for two bridged channels with compatible 4-ohm loads. Its full-range design makes it a practical option for multi-speaker upgrades where an aftermarket or factory source unit needs more output capability.\u003c\/p\u003e\u003cp\u003eThis amplifier is intended for listeners building a clearer, more controlled speaker system without using a large chassis amplifier. It provides manufacturer-rated output of 170 watts per channel at 4 ohms or 335 watts per channel at 2 ohms. For bridged applications, it is rated for 675 watts per channel across two channels at 4 ohms.\u003c\/p\u003e\u003cp\u003eAdjustable high-pass and low-pass crossovers allow the ZD-1350.4D to be matched to the role of the speakers it powers. The crossover ranges from 50 Hz to 250 Hz with a 12 dB-per-octave slope, helping separate bass and higher-frequency duties in a system. A built-in bass control is also provided for output adjustment.\u003c\/p\u003e\u003cp\u003eThe amplifier uses a PWM MOSFET power supply with a Simpatico coil design to maintain operating voltage through the output stage. Its Class D topology and aluminum heat sink support efficient operation in a compact enclosure. A low-noise preamplifier circuit is designed to accept low-level source signals with minimal distortion.\u003c\/p\u003e\u003cp\u003eFor installation flexibility, the ZD-1350.4D supports four-channel, full-range, and bridged operation modes. DC Signal Sense can turn the amplifier on when a signal is received at the RCA inputs, eliminating the need for a remote turn-on wire when that setup is appropriate. LED diagnostics provide illuminated indication for overload and speaker-short protection conditions.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Class D Design:\u003c\/strong\u003e Powers four speakers independently or supports two bridged channels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-Ohm Stable Operation:\u003c\/strong\u003e Delivers up to 335 watts per channel at 2 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Electronic Crossovers:\u003c\/strong\u003e Helps tailor frequency ranges for speakers or subwoofer applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDC Signal Sense:\u003c\/strong\u003e Can activate the amplifier from a detected RCA input signal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePWM MOSFET Power Supply:\u003c\/strong\u003e Supports stable power delivery through the amplifier circuitry.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLED Protection Diagnostics:\u003c\/strong\u003e Provides visible overload and speaker-short status indication.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe ZD-1350.4D has a black compact chassis with an aluminum heat sink for heat dissipation. Its RCA inputs are nickel-plated and specified as high-temperature, impact-resistant, and erosion-resistant. Secure molded terminals are angled for access and organized power, ground, and speaker wiring.\u003c\/p\u003e\u003cp\u003eUse 4 AWG cable at the power and ground terminals, a properly fused direct battery connection, and a secure bare-metal chassis ground. The amplifier uses an external 60A fuse and accepts up to 12 AWG speaker wire at its speaker terminals. Select four 2-ohm-or-higher speaker loads for individual channels, or use 4-ohm loads when bridging channels; install in a secure location with adequate ventilation.\u003c\/p\u003e","brand":"HIFONICS","offers":[{"title":"Default Title","offer_id":45776301195455,"sku":"ZD-1350-4D","price":158.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/6252\/4351\/files\/71cSYI7YY7L.jpg?v=1782490466"}],"url":"https:\/\/nsidistributor.com\/collections\/4-channel-amplifiers.oembed","provider":"NSI Audio Distributing","version":"1.0","type":"link"}