Would it be worth trying to tap into my bose amp wires to hook up a 4 channel amp for doors speakers. Or should I just run all separate wires to the door speakers and get it over with. I heard I can just tap into the factory bose amp wires instead of running all the other wires. True or false??? Im hooking up a four channel alpine 75x4. Thanks for all the help in advance. Yes I have upgraded my door speakers. I believe they are jl audio c3 series speakers.