Kicker CX Series CX1800.1 1800W Mono Class D Mosfet Full-Range Car Amplifier 1800 Watts RMS x 1 @ 2 ohms Total Peak Power: 3600 Watts Preamp RCA outputs to daisy chain multiple amps Variable Low-Pass Crossover: 50 - 200Hz 12dB/octave Variable Bass Boost: 0 to +12 dB bass boost at 40 Hz