Hi all, my first post in a great forum.
First of all, I am really enjoying the car, the handling is fabulous.

Has anyone figured out the wire colors for the input coming into the Bose amp in the trunk? It would be really handy if we could use that harness for inputs to a sub-amp, remote power turn on or even use another better quality amp.

I am working on it and if I get those colors down, I will post them asap

You might want to look at this thread.

http://www.rx8club.com/showthread.php?threadid=6742&pagenumber=1

The wiring schematics were posted here and it looks like the top section of the schematics pages shows the wiring coming from the "Audio Unit" which I assume means the head unit.

thanks, 91vert