putting a new headunit and a Kicker 10" L7 sub. i know with getting a aftermarket headunit yu have to re-wire the back speakers to the head unit. I have the non bose system and i just need to know which to wires do i need to run to the headunit from the speakers. what color/s are they and which one is postive and which one is negative

Also. for the amp. where do poeple put the power cord through the fire of the motor into the car. is there already a hole in the fire wall the power cord will fit through or how did people do it. if through a hole laready in te fire where exactly is it. I have a 98 audi a4 btw

 

Just throw in an extra $50 bucks, or go on craigslist and get new rear speakers and front speakers. Save yourself the hassle..The rear speakers are...retarded.

Also, yes if you pull the plastic off covering your battery area you'll see a little rubber gromet towards the driverside/middle pull it off and it will drop your wire down around where your pedals are.