I need to get a 4 channel RCA cable to send signal to my amp. I'd like to know what length you used? I plan to get a 16ft cable but I want to be sure that I will have enough.
I think 16 feet should be plenty if you run it up the center of the car. Figure if you laid down in the middle of the car...I don't think it's more than 7 feet.
i had 18ft and went around the dash and ran down the passenger rocker, into the trunk, i had a little excess, but if you want freedom of mounting possibility use a 20.