This is my problem. I had an Alpine amp installed along with Alpine 10 sub. Since then, the speakers will randomly go out on either side. I can hit the doorlock button and it will start working again. It does this a lot. My stereo guys are amazing. They have tried everything to rectify this problem. If I replace the unit, i will lose controls to everything. Has anyone had the problems? Any advice would be highly appreciated. Thanks in advance.