R2-A75M | R2-Series Mono Amplifier

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  • Regular price $699.95
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R2-Series Mono Digital Power Amplifier

| Owners Manual | R2-Series | Mono |


The innovative and highly anticipated all-new R-Series amplifiers are truly remarkable powerhouse masterpieces.

With a meticulous approach, every aspect of their design composition and engineering has been embarked upon to achieve sonic excellence and power performance, all-while embodied in a compact form factor. Furthermore, they incorporate advances in technology gained from the ultra-high-end Alpine Status series amplifiers.

A true class-leader, with 750W RMS of onboard power coupled to its all-digital “no shutdown” circuit design, the R2-A75M maintains peak performance at high power output achieving earth-shattering, authoritative bass at virtually any volume.

Be wowed by the bold aesthetic design and stunning build quality—from the moment you see, touch and hold these amplifiers exudes quality. With their solid cast aluminium body, precision machined finishes and high quality terminal blocks, every detail is premium and first-class.

Smaller and more powerful than ever. Alpine’s all-new exclusive digital design architecture has enabled the footprint size to be significantly reduced without compromising on audio specifications and power output. In fact, they are 15% smaller than their predecessors and the completely new R2-A150M is Alpine’s most powerful ever in a highly compact chassis.

Beneath the exquisite beauty cover panel lay the top panel controls providing convenient access to configure the amplifier and fine-tune audio calibration adjustments. What’s more, the single sided terminal layout and integrated chassis mounting makes installation a breeze.

These pint-sized, yet potent amplifiers gives you enormous and effortless power delivery, coupled with incredible audiophile-grade sound quality, making them the perfect choice for the astute system builder enthusiast and discerning music fans.

Born to be played Loud—the all-new R-Series gives you legendary performance with extreme power output matched with unrivalled sound quality and reliability.


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 CD’s 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 painstaking 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 artists 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.

Exquisite Design, Inside and Out

The all-new ultra-modern R-Series amplifiers are beautifully designed and constructed with machined alloy detailing and premium finishes throughout. Internally, An all-digital dual post-filter feedback loop is added for unmatched accuracy and control, while minimising internal noise.

Top Panel Controls

There when required and hidden when not, gain and crossover controls have been relocated beneath a sleek brushed alloy cover panel atop the amplifier for convenient, yet discreet use. Furthermore, mounting feet are now integrated into the chassis of the amplifier for improved aesthetics and installation simplicity.

Single Sided I/O Terminals

A considered design from every aspect, all speaker I/O is consolidated onto a single side of the chassis. This not only makes positioning and connecting the amplifier easier and more flexible, but also allows for beautifully clean installations.

Compact and Powerful

The R2-A75M has a footprint that’s a whopping 15% smaller than the outgoing model (R-A60F). This compact size greatly expands installation flexibility, making it suitable for almost any vehicle application while still punching out the same potent performance.

Trickle-Down Technology

Using “trickle-down” technology inspired design, and performance cues from the High-Resolution Alpine Status systems, the Next-Generation R-Series Amplifiers feature Alpine’s exclusive circuit design architecture that will take this legendary system to the next level in sound performance.

Control your Subwoofer

The optional RUX-KNOB.2 remote bass knob controller (sold separately) connects directly to R-Series amplifiers, providing easily accessible subwoofer control to make bass adjustments on the fly to enhance your listening experience. Its tiny dimensions allow it to be mounted in a number of handy locations for convenient control.

Better than Ever

A pillar of Alpine’s best-ever lineup of R-Series, Next Generation R-Series amplifiers provide pinnacle performance matched to the powerful and authoritative bass of R-Series Shallow Mount Subwoofers or stunning clarity of R-Series Speakers. R-Series components are designed to be played loud, for a detail rich and immersive experience thanks to their Hi-Res Audio specifications.


  • All-new Advanced Digital Design
  • Compact Chassis
  • Easy Access Controls
  • RCA and Speaker Level Inputs
  • Bandpass Filter
  • Superior Sound Stage
  • Bridgeable
  • Bass EQ
  • Subsonic Filter
  • Variable Low Pass Filters
  • Thermal Protection (Zero Shut-Off)
  • Remote Bass Knob Ready (RUX-KNOB.2)



  • Output Channel: Mono

Power Ratings

  • Power (@14.4V 1% THD)
    • Per Channel into 4 Ohms: 500W X 1
    • Per Channel into 2 Ohms: 750W X 1


  • Ref.: 10W into 4Ω: ≤0.04%
  • Ref.: 10W into 2Ω: ≤0.06%
  • Ref.: Rated Power into 4Ω: ≤1.0%
  • Ref.: Rated Power into 2Ω: ≤1.0%

S/N Ratio

  • IHF A-wtd +AES-17 Ref.: 1W into 4Ω: >75 dB
  • IHF A-wtd +AES-17 Ref.: Rated Power into 4Ω: >102 dB

Frequency Response 

  • (0+/-3dB) Ref.: 1W into 4Ω: 10Hz – 400Hz
  • (0+/-1dB) Ref.: 1W into 4Ω: 15Hz – 325Hz

Damping Factor

  • Ref.: 10W into 4Ω at 100Hz:  >250

Input Sensitivity

  • RCA Input Ref.; Rated Power into 4Ω
    • Hi: 0.4 – 10V
    • Lo: 0.1 – 4.0V


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


  • Bass EQ (fc=50Hz): 0 to +12dB (Variable)

Remote Level*

  • Linear Attenuation : 0 to -20dB

* Requires optional RUX-KNOB.2.

Input Impedance

  • > 10kΩ

Preamp Output

  • > CH-1/2 Input Pass-through, Buffered: 4V max


  • (WxHxD): 282 x 55 x 165mm
  • Weight: 3.5kg