Alpine S2-A120M Next-Generation S-Series 1200W Mono Amplifier

Elevate your system with the Alpine S2-A120M Mono Amplifier.

Its sleek design houses an Alpine Class D Amplifier Circuit with 1200W of powerful bass performance.

SKU: S2-A1200M



Alpine S2-A120M

Next-Generation S-Series 1200W Mono Amplifier

Get ready to take your car audio experience to the next level with the all-new Alpine S2-Series amplifiers!

These bad boys are designed to deliver exceptional performance and power without breaking the bank. With a sleek new redesign and upgraded features from their predecessors, the S-Series amplifiers are the perfect choice for anyone looking to upgrade their car audio system.

The Alpine S2-A120M mono subwoofer amplifier is a game-changer when it comes to getting great bass in your vehicle. With up to 1200 Watts RMS power @ 2 Ohms, this amplifier packs a serious punch. You can even run multiple subs from a single amplifier, thanks to its massive power output. And if you're looking for some extra low-frequency enjoyment, the variable bass boost allows you to dial in some extra punch and impact. Plus, with the optional wired remote, you can control the level of bass from your front seat!

But that's not all - the Alpine S2-A120M also features a built-in low-pass filter, giving you complete control over the frequency spectrum that reaches your sub. And with pre-amp- and speaker-level inputs, you can install this amplifier in almost any vehicle, even with a factory radio. Plus, 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.

The S2-Series amplifiers are available in two mono, 4-channel, and 5-channel configurations, so you can choose the perfect setup for your car's audio needs. So what are you waiting for?

Upgrade your car audio system with the all-new Alpine S-Series amplifiers and experience the power and performance you've been missing!


Unparalleled Power

Get ready to experience unparalleled power and performance without breaking the bank! Alpine's S-Series Mono Amplifiers are the ultimate solution for all your audio needs. Boasting a whopping 1200W power output at 1 Ohm or 2 Ohm drive for the S2-A120M and 600W for the S2-A60M, these mono amps are capable of driving even the most demanding subwoofers. Say goodbye to distorted and muddy bass and hello to crystal-clear, distortion-free sound that will elevate your listening experience to new heights. Whether you're a music enthusiast or a professional audio installer, the S-Series Mono Amplifiers are the perfect choice for a wide range of applications. 

Easy Control Access

The amplifier was intentionally designed with sound controls located on the side panels, instead of the top panel, making it easier to access gain and crossover controls when installed under vehicle seats or in shallow-depth locations. Removable end caps were added to cover the side controls and connections, providing a clean, sleek finish to the amplifier.

Designed for Supreme Performance

The S2-Series line-up Class-D design delivers a new level of sound quality and reliability, so you can hear the full power and clarity of your music without the concern of shutdown. Equipped with high-quality parts and precision manufacture brings incredible performance and value way beyond its modest price and nearest rival.


Made for S-Series Subs

The Alpine S2-A120M amplifier is specifically engineered to flawlessly complement the remarkable Alpine S-Series subwoofer line, enabling you to construct an impeccable audio system. The S2-Series components are meticulously crafted for bass enthusiasts who yearn for an exceptional sound experience without straining their budget.

Prepare yourself for an exhilarating and awe-inspiring journey into the world of sensational sound!

Control Your Subwoofer

Easily manage your subwoofer right from your dashboard using the optional RUX-KNOB.2 remote bass knob controller. This convenient accessory is also compatible with the S2-A326F, S2-A55V and S2-A60M amplifier when channels 3 and 4 are bridged.

Flexible Application

New to the Next-Generation S-Series amplifiers is a new selectable remote turn-on circuit, a three-position switch that ensures the amplifier turns on and off at the proper times. This design is crucial with newer, in-vehicle technology and allows for proper integration with any factory or aftermarket system.



Delivering an impressive 1200 watts of power at both 1 ohm and 2Ω, the Alpine S2-A120M is fully capable of providing ample power to two Alpine S-Series 10" or 12" Subwoofers, ensuring exceptional sound quality and optimal performance.

Watch as Alpine Brooks gives you an overview of the next generation of Alpine S-Series Amplifiers, which are designed to take your car audio experience to the next level without breaking the bank. With a sleek new redesign and upgraded features from their predecessors, these amplifiers offer exceptional performance and power on a budget. If you're looking to upgrade your car's factory audio system, the S-Series Amplifiers from Alpine could be for you.



  • 1200W Mono Power Amplifier 
  • Alpine’s Class D Amplifier Circuit 
  • Two-sided Terminal Layout
  • Built-in Selectable / Adjustable Crossovers
  • Optional Remote Bass Knob Compatible (required RUX-KNOB.2 or RUX-H01, sold separately)
What's in the Box:
  • S2-A120M Mono Amplifier x 1
  • Connection end covers x 2 w/4 attachment screws
  • Owner’s Manual 
  • “Birth Sheet” that certifies by measurement the actual power of the amplifier in the box 
  • Self-tapping screws x 4
  • Hexagon wrench x 1   
  • Alpine Registration Card 
  • Alpine Limited Warranty Sheet 
  • Tips sheet for power supply wire connections


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