Kenwood - 400W Class-D Bridgeable Multichannel Compact Marine Motorsports Amplifier with Variable Crossovers - Gray - Open Box - fair

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.

Pump up the audio in your ride with this Alpine Next Generation S-Series four-channel car amplifier. Delivering 60W per channel, or 180W to a subwoofer and 60W to two channels, this amplifier is extremely versatile. The compact size provides mounting versatility. This Alpine S-Series four-channel car amplifier automatically reduces output when it senses overheating risks.

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.