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Pioneer GM-DX871

Limited Edition mono subwoofer amplifier — 800 watts RMS x 1 at 1 ohm

Item # 130GMDX871

Pioneer's handsome GM-DX871 mono subwoofer amplifier can deliver up to 800 watts RMS to your subwoofer, for...

Pioneer's handsome GM-DX871 mono subwoofer amplifier can deliver up to 800 watts RMS to your subwoofer, for...

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About the Pioneer GM-DX871

Cool bass

Pioneer's handsome GM-DX871 mono subwoofer amplifier can deliver up to 800 watts RMS to your subwoofer, for powerful bass that'll 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. And this little workhorse can handle a 1-ohm load, so you won't have to worry too much about impedance matching when you add another sub to your system down the road.

Cool bass

Pioneer's handsome GM-DX871 mono subwoofer amplifier can deliver up to 800 watts RMS to your subwoofer, for powerful bass that'll 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. And this little workhorse can handle a 1-ohm load, so you won't have to worry too much about impedance matching when you add another sub to your system down the road.

Connections and tuning for all occasions

Speaker-level inputs allow you to install this amp in a factory system with no RCA connections — the amplifier switches its input mode automatically when it detects the high-level signal, eliminating the need to run a turn-on lead to your receiver or fuse box. The amp's got a low-pass filter that lets you quickly sharpen and focus the bass to suit your vehicle's interior, and a wired remote boost that lets you control the amount of bass boost from the front seat. This limited-edition amp uses high-grade electronic parts and gold-plated RCA connections to ensure maximum performance.

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Product highlights:

  • mono subwoofer amplifier
    • 300 watts RMS x 1 at 4 ohms (500 watts RMS x 1 at 2 ohms)
    • 800 watts RMS x 1 at 1 ohm
  • CTA-2006 compliant
  • Class D amp technology
  • frequency response: 10-240 Hz
  • variable low-pass filter (40-240 Hz, 12 dB per octave)
  • wired remote variable bass boost (0-18 dB at 50 Hz)
More Features:
  • preamp inputs and outputs
    • gold-plated RCA connections
  • speaker-level inputs via supplied RCA-type adapters
    • signal-sensing turn-on with speaker-level inputs
  • wiring and hardware not included with amplifier
    • 4-gauge power and ground leads recommended
  • fuse rating: 40A x 2
  • dimensions: 10-3/8"W x 2-3/8"H x 7-7/8"D
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # GM-DX871

What's in the box:

  • Mono subwoofer amplifier
  • Two 40-amp ATO fuses (installed)
  • 8" Speaker wire to RCA input adapter
  • Wired Bass Boost Remote
  • 16' Bass Boost Remote cable (RJ-14 plug on both ends)
  • Four 3/4" Screws
  • Two 3/8" Screws
  • 3mm Allen wrench
  • Owner's manual (English/ French)
  • Owner's manual (Spanish)
  • Warranty information

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Pioneer GM-DX871

Crutchfield customer from Benton, AR on 8/8/2019

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Great sound and easy to install.

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Pioneer GM-DX871

Crutchfield customer from Upper Marlboro, MD on 4/18/2019

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Good punch for a great price

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Features
Controls
Connections

Features

CEA-2006 Compliant: CEA-2006 is a system of testing and measurement for mobile audio amplifiers. This voluntary standard advocates a uniform method for measuring an amplifier's RMS power output. The criteria for measuring power uses a DC input voltage of 14.4 volts and the RMS power output is measured over a frequency range of 20 Hz to 20 kHz for full range amplifiers (in this case 20 Hz to 240 Hz), with 1% or less Total Harmonic Distortion plus noise (THD+N). CEA-2006 standards allow consumers to compare car amplifiers and receivers under the same conditions (apples to apples).

CEA-2006 Specifications:

  • Power Output: 300 watts RMS x 1 into 4Ω
  • Signal to Noise Ratio: 75 dBA (measured at 1 watt into 4Ω)

Other Specifications: (not using the CEA 2006 criteria)

  • Power Output:
    • 500 watts RMS x 1 into 2Ω (at 14.4 volts, 100 Hz, ≤1% THD)
    • 800 watts RMS x 1 into 1Ω (at 14.4 volts, 100 Hz, ≤1% THD)
  • Signal to Noise Ratio: 100 dB (at rated power output)

Auto Turn-on: When using a speaker level input, a signal sensing circuit will automatically turn the amp on and off along with the source unit. This eliminates the need for running a system remote control wire (turn-on lead).

Controls

Gain Control: The gain control is continuously variable from 200 mV to 6.5 V. When you use a speaker level input, the gain control range is from 800 mV to 16 V.

Crossover: The low-pass crossover is always engaged; it can't be bypassed. The crossover point is continuously variable from 40 Hz to 240 Hz and the slope is 12 dB/octave.

Remote Bass Boost Control: The included Remote Bass Boost control module lets you adjust the amount of bass boost from the front of the vehicle. The Bass Boost circuit is centered at 50 Hz, with a variable boost level of 0 dB to 18 dB. Module dimensions:

  • Width: 1¾" (2⅝ including the mounting tabs)
  • Height: ¾"
  • Depth: 1⅝" (2⅛" including knob and wiring)

Connections

Power: The power and ground connections are set screw terminals that will accommodate up to 4-gauge wire. The included 3mm Allen wrench is used to tighten and loosen the terminals.

Note: The amplifier has two 40-amp fuses installed and Pioneer recommends a 100-amp fuse in-line within 12" of the battery.

Remote Turn-on: The remote connection is a set screw terminal that will accommodate up to 8-gauge wire. The included 3mm Allen wrench is used to tighten and loosen the terminals.

Speaker Connections: There are two pair of speaker output set screw terminals, internally shorted together, so it's easy to connect two subwoofers. The terminals will accommodate up to 8-gauge wire. The included 3mm Allen wrench is used to tighten and loosen the terminals.

Signal Input: The amplifier has a pair of stereo RCA inputs. If no preamp level signal is available, use the included speaker level to RCA adapter.

RCA Output: One pair of preamp output jacks provide a convenient way to daisy-chain an additional amplifier without running another set of RCA cables from the front of the vehicle to the amplifier location. The output is not affected by the internal crossover.

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Customer Q&A

3 questions already asked

Q
How much rms will this amp be @ 2ohms?
[ hdt  May 13, 2019 ]
1 answer
A
This amp outputs 500 watts RMS at 2 ohms My Bio: https://www.crutchfield.com/bio/Paul
[ Paul  May 31, 2019 ]  Staff
Q
Will they push 2 12 kicker comp r 2 ohm?
[ Junior  Mar 24, 2019 ]
1 answer
A
Thanks for your question. For information on selecting the best amp I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences between the amp models and help you make the best choice for your system.
[ Krissy  Apr 01, 2019 ]  Staff

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