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Alpine S2-A120M

$449.00 USD $500.00 USD

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.

Alpine S2-A120M

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.

Subwoofer Wiring Diagrams

To see sample wiring diagrams for all common subwoofer/amplifier combinations, check out this informative article.


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)
  • optional wired remote available
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
  • 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