Ok, so I've searched threads, and Google for about 3 hours now and cannot find an answer. So I apologize if there is already a thread with my answer in it.

I just purchased a 2008 Mini Cooper S, it has a factory installed Amp in the back, but I would like to install 2 12" subs with an amp. I bought an in line output converter and was told to hook it up at the factory amp. The only problem I'm having is finding the wiring diagram for the amp harness. All I need is right/left rear speaker wires, and I can find my own ground for the converter. If anyone knows which wires coming from the amp are the correct ones, please let me know. As far as the rest of the wiring, I've already got ideas on how to run that but I am welcome to any suggestions

 

It would help if you post int he 2nd gen section or R56 as you have an '08 (unless it's a convertible, then 1st gen).

Research the X9331 connector. Simply taping into the rear speakers will not work as they have a cutoff at 100Hz, right where your subs should be pounding and lower.

 

Ok my bad, I'm still a bit of a n00b.

Thanks, I'll look into that