I have a 2003 8P A3 TDI Sport with a Concert sound system. The car has an aftermarket Kenwood head unit and when adjusting the fader to the rear, the rear speakers are not working at all. Is there an adaptor that is required to make the rear speakers work with the Kenwood head unit? It sounds terrible with only the front speakers working and therefore no bass at all....
I tried an adaptor from Halfords and it seemed to be faulty as the PCB within the adaptor did not seem to house any components, even the Halfords guy was confused!
Can anyone shead any light on this mystery?