Quote Originally Posted by wild2crazy View Post
Yeah probably sends signal voltages for the commands probably exactly how a steering wheel adapter does. Very nice. I see now why when hooking up the aftermarket harness you lose the 2 top speakers in the back of the bose system. 2rear tweeter are only out the 24 amp side

That's different from the Monsoon system I had in my 2005. The amp apparently functioned as the crossover for those tweeters and the ones in the front doors.

I've pretty much ditched the Monsoon. It runs the center dash speaker now. That's where I get my chimes. The rest of the speakers are driven by a Pioneer amp and a Bazooka tube sub. I can't tell you how much happier I am now with the results.