02 Allroad speakers not working, Only sub works
 

I just picked up an 02 audi allroad 2.7t quattro and the speakers do not work. The radio works and the sub works but nothing comes out of the speakers, I searched a little bit and I checked the radio fuse its good and i checked the wires leading into the driver door in the boot like some people had found a problem with, but the wires were fine there also. I checked the amp connection and it looks to be fine.

Im not sure whats going on but any help would be appreciated.

Is there any way you could test to see if power is getting to the speakers?
Have you tested the head unit for the radio?