Kenwood KAC-7204 1000-Watt Max Power Stereo Bridgeable Amplifier with Variable LPF/HPF One-year limited warranty Speaker-level inputs with signal sensing turn-on High-pass (12 dB per octave) and low-pass (24 dB per octave) filters variable from 50 to 200 Hz Rated Power: 250 Watts x 2 (2 ohm); 500 Watts x 1 (4 Ohm Bridged) MOSFET power supply Rated Power: 250 Watts x 2 (2 ohm); 500 Watts x 1 (4 Ohm Bridged) High-pass (12 dB per octave) and low-pass (24 dB per octave) filters variable from 50 to 200 Hz MOSFET power supply Speaker-level inputs with signal sensing turn-on One-year limited warranty