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The GM-DX871 mono subwoofer amplifier can deliver up to 800 watts RMS to your subwoofer, for powerful bass that will give every song a strong and heavy beat. Highly efficient Class D technology keeps this powerful amp running as cool as it looks, and allows for a small chassis that fits in a lot of out-of-the-way spaces.


  • Big Power-Small Size: Pioneer Class-D 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.
  • Variable Low-Pass Filter – 40 Hz to 240 Hz: For extra flexibility, a variable LPF makes audio frequency more adjustable according to subwoofer characteristics and personal listening preferences.
  • Protection Control System (PCS): Pioneer’s PCS continuously monitors the input voltage, current consumption, and operating temperature to automatically adjust the amplifier’s output to ensure operational stability during long listening sessions or when installed in high-temperature environments.


  • Brand: Pioneer
  • Color: Black
  • Continuous Watts x Channel @ Ohms: 300 W RMS x 1-Channel – 4 Ohm
  • Watts Per Channel RMS: 800 watts
  • Total Power Handling Maximum: 1600 watts
  • Watts Per Channel Maximum: 1600 watts
  • Number Of Channels: 2
  • Minimum Frequency Response: 10 hertz
  • Maximum Frequency Response: 0.24 kilohertz
  • Total Harmonic Distortion: 0.5 percent
  • Signal-to-Noise Ratio (SNR): 100 decibels

What’s Included:

  • 1-Channel Subwoofer Amplifier
  • Two 40 A ATO fuses (installed)
  • Bass Boost Remote Control
  • Bass Boost Remote Control Cable
  • Speaker Level to RCA Input Adapter
  • Installation Screws X 4
  • Wire Terminal Tool
  • Owner’s manual (English/ French/ Spanish)