So I recently installed a Dension ICE iPod controller onto my factory head unit and installed 4 new speakers. Things have been working find for about the past week until today. Today I'm pulling into my house and I roll the window up. As soon as the window reaches the top all the sound from my stereo shuts off. At first I thought it was just the radio losing signal (since I was listening to AM at the time) but once I tried listening to a CD or any other AM or FM stations I realized that there was no sound at all coming from any of my 4 speakers. When I turn the power off to the head unit and then turn it back on I get a slight popping sound from the left front speaker as soon as it turns on. I'm guessing that something got shorted out, maybe a blown fuse. Any ideas?

Edit: I just went and checked all the fuses in the left and right boxes and they're all fine.