Hello everyone... I have a 2005 Jaguar XKR Coupe with the Alpine system that sucks....I want to change the speakers first to see if that helps fix the problem but the only speakers that are marked is the 3.5" in the dash that I assume run off the doors since they have a basic Red and Black wire that is marked + & - on the speaker. I can not find info anywhere as to the speaker wires on the other speakers and 8" sub in the back deck.

Any info will be a huge help as to goog replacement speakers to for the factory power...