Memphis Audio MX400.4

The Memphis Audio MX400.4 is a compact four-channel powersports amplifier for side-by-side and other outdoor audio systems. Memphis rates it at 75 watts RMS per channel into 4 ohms and 100 watts RMS per channel into 2 ohms, with a 4-ohm bridged rating of 200 watts across each bridged pair. Select the speaker configuration and wiring to stay within the supported load ratings.

The IP66-rated amplifier uses a conformal-coated circuit board and sealed connectors, with top-mounted controls for setup. High- and low-level inputs, a two/four-channel input switch and a fixed 80 Hz crossover support integration with a compatible source unit. Memphis lists dimensions of 8.75 x 3.25 x 1.75 inches. Check clearance, ventilation and current requirements, and use correctly sized, fused power wiring for the installation.