I have the 6 speaker system as it comes standard on the 07 SE. I'm thinking about upgrading the whole system, possibly starting with the speakers. I've done a lot of audio work, including installing component speaker which is what I intend on using. This question is directed to those that have already had things apart inside the door.... how are the speaker and tweeter wired? Do they go back to the headunit as separate leads or is there a crossover mounted somewhere in the door or kickpanel area?