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Pioneer GM-DX871 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...

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

14 questions - 14 answers

Item # 130GMDX871

In stock
$249.99

About the Pioneer GM-DX871

Buck Pomerantz

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.

Subwoofer Wiring Diagrams

To see sample wiring diagrams for all common subwoofer/amplifier combinations, check out this informative article.

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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
  • 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

Customer reviews for Pioneer GM-DX871

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4.5 out of 5 stars
22 reviews

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More details on the Pioneer GM-DX871

Mark G.

Product Research

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

14 questions already asked

Q
Does it have built in crossovers?
issac  Jan 26, 2024
1 answer
A
This amplifier does have a built-in crossover in the form of a variable low-pass filter (40-240 Hz, 12 dB per octave).
zachary  Jan 26, 2024 (Staff)
Q
I have 2 12 inch kicker comp r 2ohm subs. What is the best way to wire this amp to get most out of it?
nvwatts  May 21, 2023
1 answer
A
I would be happy to help, Michael. If you are using the 12" Kicker CompR DVC 2-ohm version in the link below for reference, you will want to use a series/parallel wiring configuration to show 2-ohms at the Pioneer amp. This would deliver 500-watts RMS to the dual subs. The second link is to our Subwoofer Wiring Guide and will show you how to wire the two Kicker subs in series/parallel. I hope this helps! https://www.crutchfield.com/p_20648CR122/Kicker-CompR-48CWR122.html https://images.crutchfieldonline.com/ca/learningcenter/car/subwoofer_wiring/2DVC_2-ohm_mono.jpg
bo  May 22, 2023 (Staff)
Q
Can this power a kicker sub 200-400 watt rms? (800 watt peak power)?
jason  Feb 27, 2023
1 answer
A
This could power a subwoofer rated for 200-400 watts RMS. It would be important to ensure the subwoofer presents the correct impedance to the amplifier in order to achieve the correct power output. Please reach out to our advisors via online chat or phone at 1-800-324-9695 for help with this project.
zachary  Feb 28, 2023 (Staff)
Q
Is this enough power for 2 pioneer d4 12s 4ohm?
don  Jan 01, 2023
1 answer
A
That is a great question, Don. It looks like the Pioneer GM-DX871 would deliver 300 watts RMS to each speaker, and that would sound pretty good. It appears as though the D4 12's can handle 500 watts RMS max per speaker. For maximum performance the larger GM-DX971 would deliver 400 watts to each speaker at a 2-ohm load, and still within the RMS ratings of the dual speakers so for the most bass go big! https://www.crutchfield.com/p_130GMDX971/Pioneer-GM-DX971.html
bo  Jan 01, 2023 (Staff)
Q
Does this amplifier have a subsonic filter?
brent  Nov 29, 2022
1 answer
A
Greetings Doug, and thank you for your question. The Pioneer GM-DX871 does not have a subsonic filter.
hogan  Nov 29, 2022 (Staff)
Q
Anyone know the efficiency of this amp at 1 ohm?
dj ice  Aug 23, 2022
1 answer
A
Unfortunately we do not have a rating for efficiency of this amplifier at 1-ohm. Class D amplifiers generally operate around 80-90% efficiency.
zachary  Aug 24, 2022 (Staff)
Q
The 2 speaker wire connections an the Amp are a bit confusing. Sorry my question is if I put 2 4ohm speakers and use both connections on the Amp, will it put out a 4 Ohm to each speaker or does the Amp connect them internally to give me a 2 Ohm output? Thank you in advance.
rich  May 25, 2022
1 answer
A
It depends on whether the subs are single or dual voice coil. If you have two single voice coil 4ohm subs then you would wire them in parallel which would present a 2ohm load back to the amp. If you have two dual voice coil 4ohm subs then they would present 4ohms back to the amp wired in parallel.
trevor  May 26, 2022 (Staff)
Q
I have two 12 inch kicker comp c 2 ohm dvc subs. What is the best way to wire these to this amp to get the most out of it?I have this amp as well. Bought used recently together.
jeff  Dec 12, 2021
1 answer
A
First confirm they are 2ohm dvc subs as I don't believe they make a 2 ohm dvc for the comp c series. If they are wire the subs themselves in series making a 4 ohm load. Wire those 4 ohm loads in parallel bring it down to a 2 ohm load and that would be connected to the amp. Giving each sub 250 watts rms which is in their recommended range.
roderick  Dec 16, 2021
Q
Can I use this amp to power a 850 rms subwoofer?
christian  Jun 26, 2020
1 answer
A
We only recommend giving a subwoofer at least 70% of the top RMS power it can handle. This means the minimum we recommend giving your subwoofer is 595W RMS and the only way to make sure you get at least that power is when the subwoofer that can present a 1 ohm resistance to this amp. If your's cannot, we recommend getting a different amp to power your subwoofer and we have advisors that you can reach by calling 1-800-324-9695 who can discuss your sub to give a personal recommendation on an amp to power it.
jason  Jul 12, 2020 (Staff)
Q
Is this amp bridgeable?
donnie  May 20, 2020
1 answer
A
This amp cannot be bridged. It is a mono amp and does not have two channels to bridge and join together
jason  Jun 14, 2020 (Staff)
Q
What is the best single 12 inch subwoofer for this amplifier? GM-DX871
aaron  Oct 14, 2019
1 answer
A
Thanks for your question. For information on selecting the best subs 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 sub models and help you make the best choice for your system.
kristina  Oct 28, 2019 (Staff)
Q
How much rms will this amp be @ 2ohms?
herrold  May 13, 2019
1 answer
A
This amp outputs 500 watts RMS at 2 ohms My Bio: https://www.crutchfield.com/bio/Paul
jason  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.
kristina  Apr 01, 2019 (Staff)
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