My stero quit working so i bought a new pioneer from Crutchfield, hooked up everything to their specifications but also installed two 12'' subwoofers and 1200watt amp. The problem is that my speakers in the rear doors will no longer work. I called Crutchfield and they said eveythign is working and its not a wireing problem or my amp(infinity gold system amp) because my front speakers and tweeters are all working properly... so over all everythign is right everything is working and is right except the rear speakers are no longer working,. and suggestions?