Pioneer® GMD8604 - GM Series Class D 4-Channel 1200W Amplifier

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Fitment Notes:
  • Not Vehicle Specific
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Product Details

Pioneer Accessories

Universal GM Series Class D 4-Channel 1200W Amplifier by Pioneer®. Amplify every note with the extremely powerful amplifier from Pioneer that's a perfect partner for any music head on the road. Perfectly equipped with the latest technology, this high-end amp will effectively drive your sound system and provide outstanding sound quality. With this supreme amp, you can enjoy your music collection loud and proud with amazing clarity of sound.

Pioneer - AboutPioneer - Catalog


Number of Channels : 4/3/2
Maximum Power Output: 1200 W
Continuous Power Output (Ohm) : 125 W x 4 chan.
Continuous Power Output (2 Ohms) : 150 W x 4 chan.
Continuous Power Output (4 Ohms) : 100 W x 4 chan.
Continuous Power Output Bridged (4 Ohms): 300 W x 2 chan.
Frequency Response : 10 Hz to 35 kHz
Total Harmonic Distortion (4 Ohms): < 0.05% (1 kHz)
Signal-to-Noise Ratio (IHF-A Weighted, at 1 kHz): > 95 dB
Dimensions (WxHxD): 10-3/8" x 2-3/8" x 7-7/8"
Amplifier Class: D
Load Impedance Allowance (Ohms): 1 to 8
Bridgeable: Yes
Protection Control System: Yes
MOSFET Output Selection: Yes
Balanced Isolator Input Circuit: Yes
RCA Inputs: 4-Ch.
RCA Outputs (Pass-Through): Yes
Speaker Level Input : Yes
Speaker Line Input Turn-On Sensor: Yes
Hi-Volt Input Level Control: 200 mV to 6.5 V
Terminal Type: Block
Crossover Type: Variable HPF/LPF
Crossover Frequency: 40 Hz to 500 Hz
Crossover Slope: -12 dB/oct.
Bass Boost Frequency: 50 Hz
Bass Boost Level: 0 dB to 18 dB


  • Class D 4-Channels Amplifier
  • Wired remote bass level control included
  • Compact Design for Versatile Installation Options
  • Refined Class D Design Offers Extreme Efficiency and High-Quality Sound
  • Pulse Width Modulated MOSFET power supply
  • Speaker-level (high-level) inputs with signal sensing for automatic turn-on
  • 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
  • LED power (green) and protect (red) indicators
  • CEA-2006 compliant amplifier

Big Power, Small Size:

Pioneer's new extra-efficient Class-D digital amplifiers mark a dramatic improvement in power output capability, yet are 50% smaller than the current GM-Series Class-AB amplifiers. That makes them more versatile in terms of installation as well as performance.

Improved Circuit Design:

To prevent circuit shutdown, Pioneer's new digital amplifier circuit "Protection Control System" senses its internal temperature and automatically moderates input level accordingly. Stable, durable circuitry lessens the risk of high input power for the unit to achieve 1 ff connection. This design enhances the flexibility to connect multiple subwoofers to a system.

Variable Low Pass and High Pass Filter:

For extra flexibility, variable LPF and HPF make audio frequency more adjustable according to subwoofer characteristics and personal listening preferences. The GM-D8604 LPF and HPF are adjustable from 40 Hz to 500 Hz.

Speaker Level Inputs:

The GM-D8604's speaker level inputs allow you to connect your OEM unit (or any unit that doesn't have the typical RCA-type inputs) without having to buy add-on adapters. So, the install goes faster, you save money, and you've got a Pioneer amp in your vehicle.

Pioneer® was founded in 1938 in Tokyo, Japan by Nozomu Matsumoto – a man with a passion for music that he hoped to share with the world through high quality audio speakers. That passion began with a small operation to repair and manufacture speakers in Matsumoto's garage. It has since grown to international stature as a manufacturer of audio and video products for use at home, in the car, and in business environments. The element that has not changed in nearly 70 years is the passion for audio and video products that Pioneer hopes to share with the world. From the employees at their research labs looking for the "next big thing" to the engineers at Pioneer's factories focused on quality assurance to brand's product trainers explaining the new technology to customers – Pioneer remains passionate about creating an unbeatable entertainment experience.

Part Number:
Alternate MPN:
GM-D8604, PIOGMD8604

Warranty Information

Pioneer warrants that its Products will be free from defects in material and workmanship for 1 Year from the date of purchase by the Original Purchaser. This warranty does not apply to any Products that have been subjected to misuse, mishandling, misapplication, neglect (including but not limited to improper maintenance), improper installation, or alterations.

Magnuson-Moss Warranty Act:
Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)) Learn More

Vehicle Fitment

This part is universal

    Product Reviews


    Every Customer can leave a review about our service and the product that was purchased. In order to leave your review for your new product, please follow the link in the email you receive after completing your purchase. You can rate appearance, ease of installation, price/value and product quality.

    Pioneer® - GM Series Class D 4-Channel 1200W Amplifier
    Pioneer® GMD8604 - GM Series Class D 4-Channel 1200W Amplifier
    Average Rating: 4.8 of 5
    5 of 5
    Great product.
    HPosted by (West Palm Beach, FL) /
    Was this review helpful for you? Yes
    5 of 5
    No complains, great power, affordable!
    CPosted by (Brooklyn, NY) /
    Was this review helpful for you? Yes
    3.8 of 5
    Review on My Pioneer Amp.
    Overall its good. No problems so far.
    SPosted by (Los Angeles, CA) /
    Was this review helpful for you? Yes
    5 of 5
    Works Well With Pioneer 300W 6x9
    Pioneer® - GM Series Class D 4-Channel 1200W Amplifier
    I bought the amp to connect to the pioneer 300w 6x9. I have no complaints so far. Great amp, great speakers. I will recommend to my friends.
    JPosted by (Brooklyn, NY) /
    Was this review helpful for you? Yes
    5 of 5
    Brand New Sound!
    Wanted a new amplifier for a long time. Finally received this Pioneer Amplifier as a birthday present, and guess what? I'm lovin it!
    RPosted by (Brooklyn, NY) /
    2011 Dodge Charger
    Was this review helpful for you? Yes

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