The compact KAC-8104D mono amplifier features a rugged cast-aluminum chassis more than 30% smaller than its predecessor, yet it'll still punch out up to 500 watts RMS to your subwoofers without straining your car's electrical system. A built-in low-pass filter adjusts amplifier output so you'll get the best sound possible from your subwoofer/box combo, while the subsonic filter eliminates inaudible, ultra-low bass that can detract from your sub's performance. You can dial in up to 18 dB of bass boost if you want to fatten up the sound. The front-mounted controls allow you to tweak the sound easily, and convenient front-side connections make setup a snap. Signal sensing turn-on and speaker-level inputs allow these amps to hook up to factory radios that don't have preamp level outputs. minimize