Amplifier wiring diagrams: How to add an amplifier to your car audio system This simplified diagram shows how a full-blown car audio system upgrade gets wired in a car. To achieve these things, you can add an amplifier and equalizer to your stereo system. If you tied into the speaker wires before the amp, the performance would have been degraded as the bose system recreates all the sound at the amp and the "true" sound doesn't arrive until after the amp. The amplifier will add volume and depth of sound to any stereo. Car audio enthusiasts covet power and control. The … 4. Installing powerful subwoofers into an older vehicle puts a big strain upon the metal panels of the car, and the welds holding the panels together. The welds in some such vehicles involved in crashes were found to have spilt along hairline cracks, introduced by the use of subwoofers… Connect the front, rear, and subwoofer speaker wires … Apr 16, 2016 - Here's a step-by-step guide to installing a car amplifier, including how to run the cables through your car and how to wire the amp. I have only done a couple of amp/subs on bose vehicles, but each time I connected after the bose amp … More information Here's a step-by-step car amplifier installation … A car amp can be a difficult installation since you’re working with … The system includes a 4-channel amp for the front and rear pairs of full-range speakers and a mono amp for a subwoofer. This needs to be done to avoid having the amp stay switched on when you turn your ignition off, draining your car's battery flat. Amplifiers increase the output from your vehicle’s sound system so you can listen to music louder and improve the sound.