Kenwood KAC-9106D 2000W Monoblock Class D Car Audio Power Amplifier Mono subwoofer amplifier 500 watts RMS x 1 at 4 ohms (1, 000 watts x 1 at 2 ohms) Class D amp design Speaker-level inputs with signal Sensing turn-on Variable low-pass filter (50-200 Hz at 24 dB per octave)