Alpine R2-A75M



R-Series Mono Power Amplifier - RMS Power Ratings 1 x 750W @ 2 Ohms


The Alpine “R-Series” line of speakers, subwoofers and amplifiers have a heritage of sound quality you can hear from a block away, and the newly added R-Series amplifiers are no exception. Aside from their best-in-class performance, these amplifiers are tuned to emphasize the characteristics of the R-Series speakers and subwoofers, giving you that legendary R-Series experience. They have a 15% reduced footprint compared to the previous models and are easier to install.

If you like your music loud and clear, our R-Series R2-A75M mono amplifier is for you. It cleanly reproduces the bass in your music so you can enjoy the enhanced realism you want, even when you're playing High-Res music. Alpine has built some of its top-of-the-line amplifier technology into this R2-Series amp, including high-efficiency transformers, premium low-noise custom capacitors, and low-distortion dual "Sierra" feedback/correction circuitry.

The Alpine R2-A75M mono amplifier produces up to 750 watts RMS @ 2 Ohms, making it a perfect match for an Alpine R-Series subwoofer line. Advanced Class-D amp technology makes this powerful amp small enough to fit almost any location. You can adjust the amp's low-pass filter, bass boost, and subsonic filter to get just the right bass tone. Plus, you can add the optional RUX-KNOB2 remote bass knob to control your bass from the dash.

R-Series amplifiers are available in two mono and a 4-channel configuration.


Elevate Your Audio

Elevate Your Audio

Elevate your audio with the Alpine R2-A75M Mono Amplifier - delivering powerful 750W performance @ 2 Ohms in a sleek, compact design. Built with Alpine's cutting-edge Class-D Amplifier Circuit, this next-generation R-Series amp offers exceptional sound quality and efficiency, making it the perfect addition to any car audio system.

Reduced Footprint

Extensive Tuning Options

Reduced Footprint

The R2-A75M features a reduced footprint that’s 15% smaller than the previous model (R-A75M), making it easier than ever to install in most vehicle applications while still getting the same powerhouse performance.

Extensive Tuning Options

The R2-A75M features intentional design choices that prioritize convenience and simplicity. All speaker connections are consolidated on one side of the device for easy access, while the amplifier controls have been relocated to the top under a removable plate, allowing for quick adjustments to gain and crossover controls. The amplifier’s chassis also includes integrated mounting “feet” to streamline the installation process.

Remote Bass Knob Ready

Simplified Installation

Remote Bass Knob Ready

You can connect the RUX-KNOB2 remote bass knob (optional available) to the R2-A75M to control the subwoofer level straight from your dash.

Simplified Installation

Intentional designs were made to the amplifier that consolidated all speaker connections to one side of the amplifier for easy access. Amplifier controls were relocated to the top of the amplifier under a removable plate for convenient access to gain and crossover controls. To simplify the installation process, mounting brackets are integrated onto the chassis of the amplifier.

Made for R-Series Speakers & Subs

Made for R-Series Speakers & Subs

The R-Series amplifiers are designed to perfectly match the Alpine R-Series speaker and subwoofer line for perfect system building. R-Series components are designed to be played loud, for a fun and great sounding experience including Hi-Res Audio capabilities.

Get Next-Level Power with the latest generation of Alpine R-Series Amps

Get Next-Level Power with the latest generation of Alpine R-Series Amps

Join Alpine Brooks as he provides an Inside Look at the new lineup of R-Series amplifiers. With a great history and heritage of developing premium car audio amplifiers, Alpine has once again delivered with this latest generation of R-Series amps. In this video, Eric discusses the feature sets, power outputs, and sizing of these amplifiers. He also showcases the latest features that make installing these amps easier than ever. If you're looking for a reliable and great-sounding amplifier for your vehicle, look no further than the Next-Gen Alpine R-Series Amps.


00:00 - Intro

00:27 - Main Features & Models

03:49 - Amp Birth Certificates

05:12 - Configurations & Sound Systems

06:33 - Wrap Up



  • Terminal Layout: One side
  • Small footprint for easy installation
  • Screw terminals (for speaker and power cables)


  • Class-D Amplification (Digital)
  • Channel Design: Mono Channel
  • Top panel controls
  • Thermal Management Control
  • Top Mounted LED Power/Status Indicator
  • Speaker Level Input with remote turn on
  • Crossover: Adjustable Low-pass (LPF) and Variable Subsonic filter
  • Adjustable Gain Control
  • Bass EQ
  • Remote Bass Control (RUX-KNOB2) Ready


Max Power Output Ratings

  • Total Max Power: 1500W

RMS Power Ratings

  • Per Channel into 2 Ohms, 14.4V (≤1%THD+N): 1 x 750W
  • Per Channel into 4 Ohms, 14.4V (≤1%THD+N): 1 x 500W

Sound Tuning

  • Crossover: Variable LPF: 50-400Hz (-24dB/oct)
  • Crossover: Variable Subsonic: 8Hz-40Hz (-24dB/oct)


  • 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
  • Cable size: Power Cable AWG 4, SPK Cable AWG 8
  • Frequency Response: 10Hz – 400Hz
  • THD+N (@ 10W into 4 Ohms): <0.04%
  • Damping Factor: >250
  • Weight: 3.5kg


  • Heat Sink (WxHxD) mm: 282 x 55 x 165
Manual Download