Infinity Reference AMPRF3004A Fullrange Car Amplifier

Subwoofer car amplifier 350 watts RMSx1 at 4 ohm (600 watts RMS x 1 at 2 ohms), 
Class D amp technology, variable low-pass filter (32-320 Hz, 12 dB/octave), variable bass boost (0-12 dB at 45Hz), phase switch (0, 180 degrees), speaker & low-level inputs for after-market & factory car systems,  switchable dc offset turn on, crossover variable, phase switch, bass boost, balanced inputs for noise rejection, loop-through outputs for applications versatility, voltage protction, pre-amp outs