GR300.4

Powerful 4-Channel Amplifier for Full System Upgrade

The Gravity GR300.4 4-Channel Car Audio Amplifier is designed to deliver strong, clean, and reliable power for upgraded car audio systems. With a maximum output of 1200 watts, this Class AB amplifier provides excellent performance for powering door speakers, tweeters, or a full front-and-rear speaker setup. Its 2-ohm stable design ensures consistent output while minimizing distortion, making it suitable for both daily driving and high-performance audio builds.

Engineered with high-current dual discrete drive stages, the GR300.4 offers improved clarity and dynamic sound reproduction. Whether you are replacing factory amplification or building a custom system, this amplifier provides the power and flexibility needed for balanced full-range audio.

Advanced Class AB Design with Flexible Tuning Controls

The Gravity GR300.4 features continuously variable crossovers, including high-pass and low-pass filters ranging from 80Hz to 1.2kHz and 50Hz to 250Hz respectively. This allows precise tuning of frequency output for speakers and subwoofers, ensuring optimal sound balance in any system configuration.

Enhanced bass boost control (+12dB at 50Hz) provides additional low-end impact when paired with subwoofer setups. The amplifier also supports tri-mode operation and bridgeable configurations, giving users flexibility to power different speaker arrangements with a single unit. RCA and speaker-level inputs ensure compatibility with both aftermarket and factory head units.

Durable Build with Protection and Installation Convenience

Built for long-term reliability, the GR300.4 includes multiple protection systems such as overload, thermal, and short-circuit protection to safeguard both the amplifier and connected speakers. A soft start and muting function helps reduce power-on noise, while chrome-plated terminals ensure secure and stable connections.

The included remote bass control knob allows real-time adjustment of bass levels from the driver’s seat, improving convenience during playback. Compact in design, this amplifier is easy to install in most vehicle locations while still delivering strong, consistent performance for demanding car audio systems.

Highlights

• 1200W maximum output 4-channel amplifier
• 300W x 4 output at 2 ohms
• 150W x 4 output at 4 ohms
• Class AB high-current amplifier design
• 2-ohm stable for reliable performance
• Variable high-pass and low-pass crossovers
• Bass boost up to +12dB at 50Hz
• Tri-mode and bridgeable operation support
• RCA and speaker-level input compatibility
• Remote bass level control included
• Overload, thermal, and short-circuit protection
• Frequency response from 10Hz to 30kHz
• Chrome-plated RCA and speaker terminals
• Soft start and muting protection circuitry
• Compact design for flexible installation

Package Contains

• Gravity GR300.4 4-Channel Amplifier
• Remote Bass Control Knob
• User Manual
• Mounting Hardware