Kenwood X1200M eXcelon Gouriki Mono Digital Power Amplifier Mono subwoofer amplifier Power: 800 watts RMS x 1 at 4 ohms (1,200 watts RMS x 1 at 2 ohms) Dual Sigma Drive improves amp's control over cone movement variable low-pass filter (50-200 Hz, -24 dB/octave) variable infrasonic filter (15-40 Hz, -24 dB/octave)