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.

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 |