I have a 2009 A4 Avant, with the Audi Symphony sound system that has a number of speakers, including a sub-woofer in the trunk.
When it was all working, it sounded very good. However, now only the center speaker on the top of the dash works, and my repair guy says the amp is bad.

Is there anybody that fixes/rebuilds them? I previously had the braking electronic control unit on an older Audi repaired, came out fine.

Thanks. It is best to email me at zuzzer@comcast.net, since I don't regularly check this forum.

Steven