Alpine S2-A55V 5-Channel Digital Power Amplifier


Alpine S2-A55V

5-Channel Digital Power Amplifier

Get ready to take your car audio experience to the next level with the all-new Alpine S-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 S2-Series amplifiers are the perfect choice for anyone who wants to enjoy high-fidelity sound on an affordable budget.

The Alpine S2-A55V 5-channel amplifier is a true powerhouse, delivering 60 Watts RMS @ 2 Ohms of crystal-clear signal to each of your car's front and rear speakers, while simultaneously powering a subwoofer with up to 300 Watts RMS. With Hi-Res Audio capabilities in its 4-channel section and extra bass power from the sub-channel, this amp brings your music to life like never before. You'll hear all the precise details, pounding beats, and emotional power of your favourite songs with stunning clarity.

But that's not all – the Alpine S2-A55V is also incredibly versatile. For a 3-channel 2-way system, you can use the amp to drive a pair of front high-performance speakers with 120 Watts RMS each, while powering a subwoofer with 300 Watts. And with a variable bass boost on the sub-channel, you can dial in some extra kick and impact to your system's low-frequency sound. Plus, you can even add an optional wired remote to control the bass level from your front seat!

With high- and low-pass filters, you completely control the frequency spectrum that reaches your speakers and subs. And thanks to the amp's pre-amp- and speaker-level inputs, you can install it in almost any vehicle, even with a factory radio. The amp can even sense the incoming signal and turn itself on when using the speaker-level inputs, eliminating the need to run a separate turn-on wire to the receiver or fuse box.

Hi-Res Audio Certified

Get ready to experience the ultimate in sound quality with the Next-Gen Alpine S-Series S2-A55V 5-Channel Amplifier! This bad boy is Hi-Res Audio certified, meaning it can reproduce frequencies up to a whopping 40kHz. That's right, you'll be able to hear every single detail in your music like never before. And with its sleek and elevated S-Series design, this amplifier sets a new standard for entry-level performance and price.

Don't settle for mediocre sound - upgrade to the Next-Gen Alpine S-Series S2-A55V and prepare to be blown away!


What is Hi-Res Audio?

With Hi-Res Audio streaming services and music downloads available, you can now appreciate a higher sampling rate than in CDs for the playback of music, which brings your favourite music tracks to life with extreme clarity. Alpine’s Hi-Res Audio Certified Head Units, Amplifiers and Digital Signal Processors are painstakingly engineered to deliver faithful audio reproduction from high-resolution sources and recordings with sample rates up to 192kHz/24Bit. These components are optimised for high-definition playback and breathtaking performance, true to the artist's original recording.

Why Hi-Res Audio?

Listening to Hi-Resolution Audio allows you to feel every emotion and hear every nuance; every detail of your favourite artist’s original studio performance is reproduced to perfection. Hi-Res Audio provides absolutely no distortion for the ultimate listening experience.

Why Hi-Res Audio Certified?

Hi-Res Audio goes beyond the limits of ordinary amplifiers and speakers. To accurately render the sound of Hi-Resolution sound sources and recordings in true high definition the reproduction of an extended dynamic frequency range right up to 40kHz is paramount.

5-Channels to Power an Entire System 

With its versatile 5-channel design, the S2-A55V Amplifier is the perfect solution to power your sound system all in a single chassis. This amplifier delivers crisp and clear audio to up to four speakers plus an additional subwoofer to give your system a complete audio upgrade.

Designed for Supreme Performance

Get ready to experience a whole new level of sound quality and reliability with the S2-Series line-up's Class-D design! Say goodbye to the worry of shutdowns and hello to the full power and clarity of your music. Equipped with top-of-the-line parts and precision manufacturing, this incredible system delivers unbeatable performance and value that far surpasses its modest price and closest competitor. Get ready to be blown away by the S-Series line-up!

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.

Control Your Subwoofer

Conveniently control your subwoofer directly from the dash with the optional RUX-KNOB.2 remote bass knob controller. This accessory is also applicable for the S-A32F 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.


So what are you waiting for? Upgrade your car audio system with the Alpine S2-Series amplifiers


  • Terminal Layout: Two-sided
  • Included terminal covers
  • Screw terminals (for speaker and power cables)


  • Class-D Amplification (Digital)
  • Hi-Res Audio Certified
  • Channel Design: 5/4/3 Channel
  • Side panel controls
  • Thermal Management Control
  • Top Mounted LED Power/Status Indicator
  • Speaker Level Input
  • 3 turn-on modes (DC HI, Remote HI, Remote LO)
  • Input Channel Selector Switch for Subwoofer
  • Crossover: Variable Low-pass Filter (LPF) and High-Pass Filter (HPF),
  • Adjustable Gain Control
  • Bass EQ
  • Remote Bass Control (RUX-KNOB2) Ready (for channel 5 only)

RMS Power Ratings

  • Per Channel into 2 Ohms, 14.4V (≤1%THD+N): 4 x 60W + 1 x 300W
  • Per Channel into 4 Ohms, 14.4V (≤1%THD+N): 4 x 40W + 1 x 200W
  • Bridged, 4 Ohms, 14.4V: 2 x 120W

Sound Tuning

  • Crossover: Variable HPF/LPF: 50-400Hz (-12dB/oct  / -24dB/oct for subwoofer)
  • Bass EQ (50Hz bass boost up to +12dB)


  • Power Requirements: 14.4 V.DC (9 – 16 V allowable)
  • Input Sensitivity (RCA Input): Hi: 0.5V – 10V / Low: 0.2V – 4.0V
  • High Level Input with automatic power on
  • Frequency Response: 10Hz – 40kHz
  • THD+N (@ 10W into 4 Ohms): <0.03%
  • Damping Factor: >100 (speaker channels) / > 750 (subwoofer channel)
  • Weight: 3.2kg


  • Heat Sink (WxHxD) mm: 302 x 57 x 210


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