Pioneer GM-DX874 Hi-Res Class-D 4-Channel Amplifier
Hi-Res Audio Certified 4-channel Class-D amp with 150 W RMS x 4 at 2 ohms
$269.99
Overview
The Pioneer GM-DX874 is a Hi-Res Audio Certified Class-D four-channel amplifier rated 100 W RMS x 4 at 4 ohms and 150 W RMS x 4 at 2 ohms. Frequency response extends to 50 kHz, with variable high-pass and low-pass filters, speaker-level inputs, and a wired bass remote. Gold-plated RCAs complete the signal path.
Product details
Hi-Res four-channel Class-D power
GM-DX874 is Hi-Res Audio Certified with frequency response out to 50 kHz so high-resolution music keeps its detail. Continuous power is 100 W RMS x 4 into 4 ohms and 150 W RMS x 4 into 2 ohms, with bridged 4-ohm capability for a three-channel layout when you need two speakers plus a bridged bass channel.
Filters, bridging, and factory-radio inputs
Variable HPF/LPF networks (40–500 Hz range on A/B channels) let you high-pass speakers or low-pass a bridged pair. Speaker-level inputs accept factory radio outputs, and the included wired bass remote adjusts the bass channel level. Gold-plated RCA inputs and a compact Class-D chassis keep the install tidy.
Install notes
Provide solid power/ground wiring and battery-side fusing. Dual 30 A fuses protect the chassis. Confirm speaker impedance before bridging channels.
Key features
- Hi-Res Audio Certified Class-D 4-channel amplifier
- 100 W RMS x 4 at 4 ohms; 150 W RMS x 4 at 2 ohms
- Bridgeable for 300 W RMS x 2 at 4 ohms
- Frequency response 10 Hz – 50 kHz
- Variable HPF/LPF 40–500 Hz on A/B channels (−12 dB/oct)
- Gold-plated RCA inputs
- Speaker-level inputs for factory radios
- Wired bass remote included
- Fuse rating 30 A x 2
- Allowable load 2–8 ohms (follow Pioneer bridging rules)
Specifications
| Weight | 5.51 lbs |
|---|---|
| Dimensions | 13 × 11 × 5 in |
| Brand | Pioneer |
| Model | GM-DX874 |
| SKU | GMDX874 |
| UPC | 884938421843 |
| Product type | Amplifier |
| Amplifier Class | Class D |
| Continuous Power Output | 100 W RMS x 4 @ 4 Ohm; 150 W RMS x 4 @ 2 Ohm |
| Max Power Output | 1200 W |
| Frequency Response | Up to 50 kHz (Hi-Res Certified) |
| Crossover | Variable HPF/LPF |
| Remote Control | Wired bass remote included |
| Speaker Level Input | Yes |
| RCA Inputs | Yes (gold-plated) |
| Load Impedance | 2 ohm to 8 ohm allowable |
| Bass Boost | Yes |
| Hi-Res Audio | Certified |
| Channels | 4 channel |
| Fuse | 30 A x 2 |
Important notes
- Do not bridge into a 2-ohm load—follow Pioneer's 4-ohm bridged guidance.
- Size power wire and battery fuse for continuous current draw of a four-channel Class-D amp.
- Speaker-level inputs still require proper 12 V, ground, and remote turn-on wiring.
- Mount with heatsink airflow; this chassis has no cooling fan.
What's in the box
- Pioneer GM-DX874 4-channel amplifier
- Wired bass remote control
- Remote cable
- Mounting screws
- Owner's manual
