The Pioneer GM-DX874 four-channel amplifier will deliver up to 150 watts RMS to each of your front and rear speakers for powerful music. Highly efficient Class D technology keeps this powerful amp running as cool as it looks, and allows for a compact chassis that fits in a lot of out of the way spaces. The frequency response of this amplifier stretches up to 50,000 Hz, for Hi-Res Audio Certified playback. Pioneer uses high-grade electronic parts and gold-plated RCA connections to ensure maximum performance. 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. Built-in high- and low-pass filters let you adjust the sound for your vehicle's interior, whether you're driving speakers or subs.
Q: Does this amplifier have a variable low-pass filter?
A: Yes, it has a variable LPF that makes audio frequency more adjustable according to subwoofer characteristics and personal listening preferences.
Q: What is the maximum frequency response of this Pioneer amplifier?
A: The frequency response of this amplifier stretches up to 50,000 Hz, for Hi-Res Audio Certified playback.
Q: Does this amplifier have speaker-level inputs?
A: Yes, speaker-level inputs allow you to install this amp in a factory system with no RCA connections.
Q: How much power can this amplifier deliver to each speaker?
A: This Pioneer four-channel amplifier will deliver up to 150 watts RMS to each of your front and rear speakers.
Q: Why is this amplifier so compact?
A: Highly efficient Class D technology keeps this powerful amp running cool and allows for a compact chassis that fits in a lot of out-of-the-way spaces.
Q: What is the signal-to-noise ratio of this amplifier?
A: The signal-to-noise ratio is 95 decibels.
A: I have this hooked up to a Sony xplode head unit and no popping issue, it’s powering my 4 pioneer TS-Z65CH door speakers.

The Pioneer GM-DX874 four-channel amplifier will deliver up to 150 watts RMS to each of your front and rear speakers for powerful music. Highly efficient Class D technology keeps this powerful amp running as cool as it looks, and allows for a compact chassis that fits in a lot of out of the way spaces. The frequency response of this amplifier stretches up to 50,000 Hz, for Hi-Res Audio Certified playback. Pioneer uses high-grade electronic parts and gold-plated RCA connections to ensure maximum performance. 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. Built-in high- and low-pass filters let you adjust the sound for your vehicle's interior, whether you're driving speakers or subs.

This multi-channel car audio amplifier delivers powerful RMS output, low distortion, and a high signal-to-noise ratio, with bridgeable channels for flexible upgrades. Its fast-cooling aluminum body ensures clear, stable performance, fits a wide range of vehicles, and installs easily—ideal for daily drivers and audio enthusiasts alike.

Boost the sound of vehicle door speakers with this KICKER four-channel amplifier. The variable bass boost lets you easily tune the system as desired, and Fail-safe Integration Technology-PLUS provides clear sounds with its noise rejection. This KICKER four-channel amplifier features high-efficiency heat sinks, preventing overheating during long periods of use.

The GM-DX871 is a 1-channel subwoofer amplifier that can deliver up to 800 watts RMS to your subwoofer, providing powerful bass with a strong and heavy beat. CTA-2006 compliant, this highly efficient Class D amplifier offers impressive, high-quality power in a compact chassis. The speaker-level inputs allow you to install this amp in a factory system without RCA connections. The built-in low-pass filter lets you optimize the sound for your vehicle's interior. Additionally, a wired bass control remote enables you to easily adjust the amount of bass from the subwoofer output. The GM-DX871 amplifier uses high-current, high-grade electronic components and gold-plated RCA connections to ensure maximum performance.
| Pros for Pioneer - 4-Channel Class D Amplifier - Black | |||
|---|---|---|---|
| Sound Quality, Power, Size, Installation Ease | There were no pros for this product— | Sound Quality, Power, Ease of use, Size, Price | Power, Sound Quality, Size, Ease of use, Price |
| Cons for Pioneer - 4-Channel Class D Amplifier - Black | |||
| Heat Dissipation | There were no cons for this product— | Heat | Heat |
Customers consistently note the decent sound quality and ample power provided by the 4-Channel Class D Amplifier. Many also appreciate the ease of installation. A few customers mention that the amp can get a little warm.
The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
I just installed this amp to replace my failed kenwood excelon x600f. I did not expect the clarity, or quality from such a compact amp, especially one by pioneer. Main reason I purchased this amp was the rms ratings matched what I already had. Right out of the box with default settings it pushed my polk audio 6.5 components in the front and my morel maximo 6 in the rear with ease and crisp, clean response I was impressed and rather shocked to know I was missing something when I turned this little beast on. My other amp was failing on the rear channel plus getting slight distortion on the front. Now, i'm sitting in the driver's seat feeling my hair fly back while smiling ear to ear.(old pioneer commercial) Only thing I do not like is how the rca inputs are on opposite side of the amp. Made my install a bit awkward looking with the setup I already had. Other than that, this thing is downright lean and mean...
JLCIII Posted
Perfect 4 channel amp for the price, installation was great and professional looking
MatthewM Posted
I purchased this amplifier to power four Alpine Type R 6x9s. The sound is super crisp, and I have pushed this amplifier hard every day for over one month without issue. Its size is slightly large in comparison to my Kicker 800.1, but it can easily mount to seats, under seats, or to an enclosure. This amplifier provides great value, as it is the only one in its price range to have solid reviews and 100w rms/channel. You will not be disappointed.
Logan Posted