The pioneer gm-d8604 is a compact and powerful 4 channel amp. It is 50% smaller than any other amp in the GM-series. This gives you  more flexibility when it comes to installation and overall audio performance.

Circuit Design

The Pioneer gm-d8604 has an improved circuit design. You never have to worry about power surges or inconsistent internal temperatures thanks to the protection control system which accurately moderates input levels. With this improved design, you can configure several subwoofers to your car audio system.

Level Inputs  

Wouldn’t it be so much fun if you could link your OEM without necessarily having to purchase add-on adapters? With the Pioneer gm-d8604 4 Channel Amp , you can easily build upon your existing system even without having a Pioneer headunit.

High Pass Filter and Variable low Pass

You can adjust audio frequency depending on your subwoofer specifications and the genre of music you want to listen to with the variable low pass and the high pass filter that comes with the amp.


  • GM Digital Series 4-Channel Class FD Car Amplifier
  • RMS Power Rating:

4 ohms: 100 watts x 4 chan.

2 ohms: 150 watts x 4 chan.

1 ohm: 125 watts x 4 chan.

Bridged, 4 ohms: 300 watts x 2 chan.

Max power output: 600 watts x 2 chan.

  • Pulse Width Modulated MOSFET power supply
  • LED power (green) and protect (red) indicators
  • 4/3/2 channel operation
  • Preamp RCA outputs to daisy chain multiple amps
  • 3-way protection circuitry (thermal, overload, and speaker short protection)
  • High-density split-dome convection heat-sink for extreme heat dissipation
  • Nickel-plated RCA level inputs
  • Nickel-plated screw terminals 
  • Input sensitivity:
  • Low level: 200mV-6.5V
  • High level: 0.8V-16V
  • Variable high-pass filter (40-500 Hz, 12 dB/octave)
  • Variable low-pass filter (40-500 Hz, 12 dB/octave)
  • CEA-2006 compliant amplifier
  • Frequency response: 40-50,000 Hz
  • year Sonic Electronix Warranty


What You Get In The Box

  • 4-Channel amplifier
  • Two 30 amp ATO fuses (installed)
  • Two 8″ Speaker-level input adapters
  • 3mm Allen wrench
  • Four 5/8″ Self-tapping screws
  • Owner’s manual (English/ French/ Spanish)
  • Warranty information

Must Read:Best 4 Channel Amp 2017

Final Remark

This compact, nice-looking amp can deliver up to 100 watts RMS to both you front and rear speakers. The effiecient and powerful Class D  technology ensures that the Pioneer gm-d8604 is running smoothly. It is definitely a bang for the buck and we highly recommend it.