blown door speaker turns down amp
(I'm actually an Audi fan, too... next car, A6 or S6) Either replace the speakers and go from there, or if you are worried, replace them with a dummy resistor (something like 5w or 10w should be fine with the volume low, and should be relatively cheap and easy to find) and make sure there is no DC output using a multimeter. Sometimes the same trick properly works without even having a dummy resistor.
Another alternative: If you've got any working but otherwise crappy speakers around, you can try installing them without putting everything back together just to see if the amp sounds okay on them...


