Hi, thanks for looking, I have just bought an audi a3 1999 (T plate) and I'm trying to wire an aftermarket cd player into it. I bought a harness adaptor from halfords, but this only got the front two speakers working. I was wondering if anyone can help me get the 2 rear speakers and sub working? Is there any other adaptors you can buy that will get the whole system going?
Thanks very much.

 

Just to clarify its not the BOSE sound system.