Massive bass power Alpine's Next Generation S-Series S2-A120M mono subwoofer amplifier makes it a lot easier to get great bass in your ride, delivering up to 1200 watts RMS power to your sub. A variable bass boost allows you to dial in some extra kick and impact for more low-frequency enjoyment. You can even add an optional wired remote to control the level of bass from your front seat. S2-A120M signal connections and controls More convenient features A low-pass filter puts you in command of the frequency spectrum that reaches your sub. The amp includes preamp- and speaker-level inputs, so you can install it in almost any vehicle, even one with a factory radio. When using the speaker-level inputs, the amp can sense the incoming signal and turn itself on, eliminating the need to run a separate turn-on wire to the receiver or fuse box. Product highlights: mono subwoofer amplifier 600 watts RMS x 1 at 4 ohms 1200 watts RMS x 1 at 2 ohms 1200 watts RMS x 1 at 1 ohm variable low-pass filter (50-400 Hz, 24 dB/octave) variable bass boost (0-12 dB at 50 Hz) More info: preamp and speaker-level inputs speaker-level inputs handle up to 10V RCA adapters required for speaker-level input signal-sensing turn-on with speaker-level inputs preamp outputs wiring and hardware not included with amplifier 4-gauge power and ground leads recommended fuse rating: 25A x 4 13.75"W x 2.21"H x 8.3"D warranty: 1 year What's in the box: Mono subwoofer amplifier (four 25A ATO fuses installed) 2 End caps Four 3/4" screws Four 1/4" screws 2.5mm Allen key Owner's manual (En/ Sp/ Fr/Others) Alpine Verification Certificate Warranty information Power supply note On-line product registration information