Product info:mono marine subwoofer amplifier300 watts x 1 at 4 ohms500 watts x 1 at 2 ohms750 watts x 1 at 1 ohmvariable low-pass filter (50-250 Hz, 12 dB/octave)switchable subsonic filter (25 Hz, 24 dB/octave)variable bass boost (0-12 dB at 45 Hz)wired remote bass level controller includedMore Info:conformal-coated circuit boardpreamp and speaker-level inputsspeaker-level inputs handle up to 9V (20 watts)selectable signal-sensing turn-on with speaker-level inputwiring, fuse, and hardware not included with amplifier10-gauge power and ground leads and a 35-amp fuse recommendeddimensions: 12.1"W (incl wiring) x 2.27"H x 5.85"Dwarranty: 1 year60-day returnsMFR # NA3-750.1Item # 049NA37501California customers: Please click here for your Proposition 65 WARNING. Read more