Alpine R-A75M 

Alpine R-A75M R-Series Mono Amplifier - All-new design for sonic excellence.

  • 500 watts RMS x 1 at 4 ohms (750 watts RMS x 1 at 2 ohms)
  • Bass Knob Control Ready 
  • Hi-Res Audio Ready 
  • Sierra-Lo Digital Design 
  • Thick Heat Sink 
  • Sub Heat Sink

Sound Garage - for all your Alpine R-Series Solutions




Alpine R-A75M

R-Series Mono Digital Amplifier

The new Alpine R-Series amplifiers produce accurate imaging and dependable power.

Use the new Alpine R-Series amplifiers with the Alpine R-Series speakers for a loud and fun experience!

Beyond their stunning and bold design, the new Alpine R-Series Hi-Res AUDIO certified amplifiers redefines the industry benchmark in sound performance delivering true high-resolution sound reproduction. Moreover, their all-new digital design provides huge amounts of power output and an extraordinary dampening factor makes these amplifiers class-leading in every way.

The Alpine R-Series Amplifiers have a diagnostic LED located behind the blue Alpine Jewell on the top of the amplifier. A Blue light means the amplifier is operating normally. A red blinking light means the amplifier is currently too hot for operation and needs to cool down. A solid red light can mean three things; 1. Amplifier circuit is abnormal. 2. Temperature is too high. 3. Power supply voltage is too high.

The Alpine R-Series amplifiers utilize Alpine’s advanced amplifier platform that takes the classic Class-D amplifier circuit and adds dual post-filter feedback loops for unmatched accuracy and control. This technology, originally launched in the premium X-Series amplifiers, produces efficient power with enhanced dynamic range, qualifying the Alpine R-Series amplifiers to be Hi-Resolution Audio compliant.

Alpine R-A75M - Specifications:

  • Power output 4-Ohm @ 14.4 Volts: 750 W RMS X 1
  • Power output 2-Ohm @ 14.4 Volts: 500 W RMS X 1
  • THD 10 W into 4 Ohms: Less Than 0.02%
  • THD 10 W into 2 Ohms: Less Than 0.03%
  • THD Rated Power 4 Ohms: Less Than 0.3%
  • THD Rated Power 2 Ohms: Less Than 1.0%
  • S/N Ratio: 1 W into 4 Ohms: >85dB
  • Frequency Response:+0/-3 dB 10Hz - 400Hz
  • Frequency Response:+0/-1 dB 15Hz - 325Hz
  • Input Sensitivity: Hi (0.5 - 10V), Low (0.2 - 4.0V)
  • Crossover: Variable HPF/LPF, (50Hz - 400 Hz)
  • Dimensions: Width - 10-3/4", Height - 2", Depth - 7-7/8"
  • Weight: 7lb


In the box:

  • Alpine R-A75M Mono Amplifier
  • 4 x M4x20 Self Tapping Screws
  • 8 x Mounting Bracket Screws
  • 4 x Mounting Brackets
  • 1 x Hexagon Wrench

Sound Garage, your Authorised Alpine Car Stereo and Navigation Specialist in Brisbane's Northern Suburbs.


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