In this video we take you through the steps to bypass a factory amplifier when replacing your cars radio. In this video we show you the basic steps need to bypass for factor amp when adding an aftermarket amp. We show you how to test for speaker wires. Then we . Watch as Allyn explains the answers to two Car Audio questions, both about bypassing factory amplifiers in a car audio system. He explains what factors into . Quick video to show that you can bypass factory amp and install aftermarket cd stereo 1998 lexus gs300.