Ok. I don't know $hit about electrical components. So i apologize ahead of time if this is a stupid question. I drive a 1991 Audi Coupe Quattro, I replaced the front and rear speakers myself. The fronts are like little 3 or 4 inchers and the rear are 5 1/2 i think. I just upgraded my head unit to a new sony. I had a shop install it because the audi speakerwire color coding is weird. So heres my question, when i crank the volume to any decent level, i get most of my volume from my front speakers and hardly anything out of the rear. is it possible the shop reversed the wires? Also, the front speakers POP. Don't know if thats related or not. Any and all help is deeply appreciated. Thanks