Amplifier wiring diagrams: How to add an amplifier to your Oct 27, 2017How to wire a full car audio system . This wiring diagram shows how a full-blown car audio system upgrade gets wired in a car. The system depicted includes new speakers, an aftermarket receiver, a 4-channel amp for the front and rear pairs of full-range speakers, and a mono amp for a subwoofer. The extra gear you'll need for wiring the ampsReviews: 251Author: Buck Pomerantz How to Install a Car Amp - Car Audio Help How to Install a Car Amp . Installing car audio amplifiers is one of the trickiest things a newbie car audio installer can attempt. Car amp installation requires that all sorts of panels be removed and that various wires be run all over the car.