Memphis 76PRX500.4V2 4-Channel 500W Car Amplifier

The Memphis 76PRX500.4V2 is a four-channel Class D car amplifier designed to add dedicated power and tuning control to an aftermarket speaker system. It delivers up to 125 watts RMS to each of four channels at 2 ohms, making it suited to powering front and rear speakers or a component-speaker setup. Its compact footprint helps address installations where available mounting space is limited.

This 250th Anniversary Special Edition version uses red, white, and blue LED accent lighting for a commemorative visual presentation. A white LED acrylic top cover and concealed top-mounted controls keep the amplifier's adjustment area accessible while maintaining a clean installed appearance. Red top ground lighting and blue bottom ground lighting provide the additional accent illumination.

For system tuning, the amplifier provides variable crossovers using 12 dB/octave Butterworth slopes. Its variable EQ boost adjusts from 0 to 12 dB, allowing an installer to tailor the response to the speakers and vehicle. The full-range frequency response is rated from 10 Hz to 27 kHz with total harmonic distortion below 1%.

The 76PRX500.4V2 supplies 75 watts RMS per channel into 4-ohm speakers or 125 watts RMS per channel into 2-ohm speakers. It can also be bridged into two channels rated at 250 watts RMS each into 4 ohms. This gives it flexibility for four full-range speakers or a mixed system that uses bridged channels where appropriate.

An extruded aluminum heatsink supports the compact chassis design, which measures 8.6 by 5.7 by 2.16 inches. Selectable amplifier turn-on adds installation flexibility when integrating with compatible source units. Memphis lists the 8GKIT as the recommended amplifier installation kit for this model.

Key Features

• Four-Channel Class D Output: Powers four speakers with up to 125W RMS per channel at 2 ohms.
• Bridgeable Channel Design: Configures as two bridged 250W RMS channels at 4 ohms.
• Variable Butterworth Crossovers: Helps match the amplifier output to the speakers being used.
• Variable EQ Boost: Provides 0–12 dB of adjustable tonal enhancement.
• Special Edition LED Accents: Uses red, white, and blue lighting details for a commemorative appearance.
• Compact Aluminum Chassis: Fits in space-conscious installations while using an extruded aluminum heatsink.

Design & Installation

The amplifier combines an extruded aluminum heatsink with an LED-accented acrylic top panel. Its top-mounted controls are hidden beneath the panel, keeping the adjustment area protected and visually tidy. The Special Edition lighting includes red top ground lighting, a white LED top cover, and blue bottom ground lighting.

Mount the amplifier where its 8.6 by 5.7 by 2.16-inch chassis can be secured and where wiring and control access remain practical. Use speakers wired for supported 2-ohm or 4-ohm stereo loads, or 4-ohm loads when bridging channels. Memphis recommends its 8GKIT amplifier installation kit for this model.