I just recently replaced my head unit and the front two speakers with kicker speakers. The head unit works fine, the front speakers work great, my kicker sub works great, but my stock speakers in the rear are not playing at all. I faded the music to the rear and only the sub works, no sound from the rear speakers. I was thinking I may have blown them while listening to music with the new speakers because now I can actually turn it up loud. any suggestions? 2004 xterra XE 2.4L 5 speed with stock system, no rockford fosgate setup. Thanks!