I recently bought a 2001 Saturn L200. It has 8 speakers, 4 tweeters and 4 mid drivers. The system sounds good right now, but I am curious about putting a new head unit it. Will the sound automatically be directed, as it is now, to the tweeters and mids? Or will I have to do some rewiring to get some of the sound to the mids, and some to the highs... anyone install into one of these before?