I know this thread is old, but reading this over and over again this statement makes no sense. If you are bypassing doesn't it mean you tap after since sound comes from HU to the amp then to speakers. This statement alone has just haulted literally hours of reading ive been doing lol. I'm assuming when you tap it's literally just rewiring the front speakers but using the factory harness so that you don't have to literally run wires through the door, meaning you tap AFTER the amp, before the speakers.Tap it before the amp. You are bypassing the stock amp.