Aftermarket amplifiers bring vigor to a standard car audio system. The more channel it has, the more significant number of speakers and subs it can operate. One example of a special amplifier type that’s sure to boost the quality of your new or existing sound setup and easily beats a dash-mounted receiver is a 4-channel amplifier. 

4-Channel Car Audio Amplifier: Design & Function

An upgrade from the mono and 2-channel amp, the 4-channel amp is designed to run a four-speaker system, making it the first of the many succeeding amp types to provide an excellent sound experience. It is also a versatile amplifier type as it can be used for different wiring combinations, especially with a component speaker setup. If you wire it correctly, you can power up to eight door speakers! 

This amp type’s circuit configuration is usually assembled as Class AB, known to produce the least amount of distortion, and Class D which is the highest power-efficient amplifier class. 

4-channel amps also frequently feature preamp outputs to augment weak signals before it gets received by the amplifier or a signal pass-thru that rids of the need to wire another RCA cable to the head unit.

Bridging a 4-Channel Car Audio Amplifier

A 4-channel amp has four outputs: one front pair and one rear pair, ideally occupied by full-range component speakers located inside the door panels. Bridging this amplifier unlocks new variations. One example is to bridge the two rear channels together to power a subwoofer, leaving the first two channels for the standard right and left speakers. If you wish to hook more than one sub on your 4-channel amp, check out our subwoofer wiring diagrams for a proper guide.

Make your car audio system more alive with a 4-channel amplifier. Browse through our extensive list of available 4-channel amps, only at Sonic Electronix.