For wiring the speakers, I just bypassed all the stock wiring, and put new amps in. I run an amp for the front speakers, and an amp for the rears. Gives me awesome sound.

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-Justin

91 560 SEC AMG - other dogs dd
01 Honda S2000 - dogs dd
07 MB ML320 CDI - dd
16 Lexus IS250 - wifes dd

it's automatic.