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Compact black metal car amplifier with gold RCA terminals and wired bass remote

Pioneer

Pioneer GM-DX871 800W RMS Class D Mono Car Amplifier

SKU CH-Y85A-ACJKW

Delivers up to 800W RMS at 1 ohm with a variable low-pass filter from 40 to 240 Hz and includes a wired bass remote

  • Product typeAmplifiers
  • Key features800 W RMS @ 1 ohm, 500 W @ 2 ohms, 300 W @ 4 ohms
  • 800W RMS at 1 ohm delivers deep, clean bass power
  • 500W RMS at 2 ohms and 300W at 4 ohms suit multiple subwoofer loads
  • Class D mono design runs cool and efficient for long listening sessions
  • Variable low-pass filter from 40 Hz to 240 Hz lets you tune the bass response precisely
  • Wired bass remote with 50 Hz boost puts level control at your fingertips

Purpose and fit

The Pioneer GM-DX871 is a Class D mono car amplifier rated at 800W RMS at 1 ohm, 500W RMS at 2 ohms and 300W RMS at 4 ohms. It suits drivers who want a single high-current channel for a subwoofer system and need flexible low-pass filtering. The wired bass remote lets you adjust 50 Hz boost from the driver seat without reaching the boot.

Upgrade path

This amplifier replaces a factory head-unit output or a lower-powered mono amp that cannot deliver clean power below 2 ohms. The jump is worthwhile when your subwoofer wiring presents a 1-ohm or 2-ohm load and you need 1% THD headroom that smaller amps cannot sustain. It also adds gold-plated RCA terminals and 2-channel preamp outputs for daisy-chaining another amp.

Capacity and headroom

The low-pass filter covers 40 Hz to 240 Hz at a 12 dB per octave slope, and frequency response spans 10 Hz to 240 Hz, so deep bass is handled cleanly. Dual 40A fuses and a 10.8 V to 15.1 V supply range protect the circuit during voltage dips. Headroom runs out if your subwoofer demands more than 800W RMS at 1 ohm or if you need stereo channels for full-range speakers.

How it compares

Measured against everything we stock in Car Audio Amplifiers, at today’s prices. Recalculated every night.

Price $177.99
Cheaper than about 61% of the 158 comparable items (median $225.49).

Specifications

Product
Brand namePioneer
Product typeAmplifiers

Questions about this item

What gauge power and ground wire does the Pioneer GM-DX871 need for its 40A x 2 fuse rating?

Use 4 AWG power and ground wire to handle the 80A total fuse rating; run a fused distribution block near the battery and secure the ground to clean chassis metal.

Which wiring step is most often missed when hooking up the GM-DX871's speaker-level inputs?

Connect the speaker wires to the high-level input plug, then set the input selector to "High" so the amp actually reads the signal instead of staying silent.

When should the 40A fuses on the GM-DX871 be replaced?

Replace both 40A fuses only after a fault blows them; inspect the power wire for shorts and verify the amp's protection LEDs are off before installing new fuses.

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