OK, I have a pretty serious stereo system from my Integra that I'd like to transplant into the new WRX ('03 black wagon, loving every minute!). I am REALLY liking the stock head unit with the indash changer and cassete player, and my old Eclipse CD player is shot anyway, so I'd like to get my amps and speakers into the car without replacing the head unit (not yet, anyway).
Is there factory wiring into the trunk area already for the factory sub option? Is there ANY way to tap a line-level preamp out from the stock HU? Or has anyone attempted to do this with a speaker to line-level converter? I realize the quality will be a bit less than a good head unit with solid preouts, but I would like to at least give it a shot for the sake of keeping a low visibility install and saving the changer/cassete combo.
Any experiences or ideas would be very much appreciated!