STX Audio SX502 5.25" 2-Way Coaxial Car Speakers

The STX Audio SX502 is a pair of 5.25-inch 2-way coaxial car speakers made for replacing compatible factory door or rear-deck speakers. Its compact round format is intended for vehicles with 5.25-inch speaker locations, helping update worn or limited factory speakers without moving to a separate-component layout. The pair uses a standard 4-ohm nominal impedance for use with compatible car audio equipment.

Each SX502 combines its woofer and high-frequency driver in a coaxial arrangement, allowing full-range playback from one mounting position. This makes the speakers a practical choice for systems where space is limited or where the original speaker location is retained. Their specified 85 Hz to 22 kHz frequency response is focused on midrange, vocal, and high-frequency coverage.

The pair is rated for 120 watts RMS combined, or 60 watts RMS per speaker, with a 450-watt maximum power rating. This power handling supports use with a compatible factory or aftermarket head unit and can also suit an appropriately matched amplifier. Use clean power and avoid excessive distortion to help maintain reliable performance.

STX Audio uses black injection-molded cones with rubber edge surrounds to support controlled cone movement in an automotive environment. A 1-inch aluminum voice coil and 12-ounce magnet are part of the speaker motor assembly. The black steel basket provides the mounting structure, while the supplied grilles add protection for exposed installations.

The SX502 is part of the STX Audio Street Series and is sold as a stereo pair. Gold-accented grilles provide a coordinated finished appearance when grilles are used. Before ordering, confirm the vehicle's factory opening, mounting depth, screw pattern, and connector requirements because a nominal 5.25-inch speaker size alone does not verify vehicle fitment.

Key Features

• 5.25-Inch Size: Fits compatible compact factory speaker locations.
• 2-Way Coaxial Design: Combines full-range drivers in each speaker.
• 120W RMS Per Pair: Supports 60 watts RMS per speaker.
• 4-Ohm Impedance: Works with compatible car audio systems.
• Rubber Edge Surround: Supports controlled cone movement during playback.
• Included Grilles: Two gold-accented grilles complete the pair.

Design & Installation

The SX502 uses a black injection-molded cone, rubber edge surround, 1-inch aluminum voice coil, 12-ounce magnet, and black steel basket. These materials form a durable coaxial speaker assembly for automotive use. The included grilles have gold accents consistent with the Street Series presentation.

Install the speakers only in locations that accept a 5.25-inch round speaker and provide sufficient clearance behind the mounting surface. Verify mounting-hole pattern, mounting depth, wiring polarity, and factory connector compatibility before installation; adapters may be needed depending on the vehicle. Connect each speaker to a compatible 4-ohm-capable head unit or amplifier and keep power within the stated RMS rating.