got amp and sub in boot and have wired my cross overs and tweeters into my door cards but how do i get the wire from the amp to my cross over's 
i know obv run under carpet etc but i dunno how to get it from the car to the inside of the door ?
and quick question on a 4 channle amp do all 4 channles have to be in use
i know obv run under carpet etc but i dunno how to get it from the car to the inside of the door ?
and quick question on a 4 channle amp do all 4 channles have to be in use
