Originally Posted by ry335
I assume it was not, they said they just replaced the "radio".
Considering that the OEM amp is the one that power the speakers and not the OEM HU, I would say that it should have been the first step in the troubleshooting...
-2012 E92 M3 Jerez Black/Rust Brown, M-DCT: September ED
-2008 E90 M3 Melbourne Red/Bamboo, 6MT: Gone
-2007 MK5 GTI United Grey/Grey, DSG: Gone
-2004 E46 M3 Carbon Black/Cinnamon, 6MT: Gone
-2002 E46 330i Orient Blue/Natural Brown, 5MT: Gone