I have a 2001 eclipse with premium infinity. I have searched and read A LOT but cant find the right answer. I replaced my components and I want to know if it's possible to route a 4 channel amp BEFORE the stock infinity amp for the doors and rears and leave the tweeters hooked to the infinity stock amp. I want to retain my factory head unit also. I've seen the wiring diagrams and was wondering if the color codes are the same for input/ output to the factory amp. And can I just cut the wires I need after the stock amp and retain the factory wire routing?