Multi-Channel

Multi-channel amplifiers power your door speakers, and with 5-channel models a subwoofer too, giving cleaner volume than a head unit's built-in amp. The range includes 2, 4 and 5-channel amps from JBL, Pioneer, DS18, Kenwood, Hertz, Black Diamond, Infinity, JVC, Rockford Fosgate, Alpine, SoundStream, Sound Storm Labs and Boss Audio.

Popular choices include the JBL Club A754 and DS18 SXE series 4-channel amps, the Kenwood X802-5 and JBL Club A5055 5-channel amps, and the JBL DSP2544 with built-in sound processing. The JVC KS-DR1004D suits marine, UTV and motorcycle use. Many models are bridgeable, so a 4-channel amp can run front speakers plus a sub. Compare RMS power per channel with your speakers' ratings, and look for high-level inputs if you're keeping a factory stereo.