I took a 2k mile road trip this past week (DC to Boston to Detroit to DC) and noticed that if I played my empeg for several hours at a time, I'd eventually get 'glitching': what sounded like records being 'scratched' at full volume (usually much louder than the music). The sound is somewhat painful. When I take out the empeg it's usually very warm, but I lean towards 'hot' instead of 'warm.' I let the unit cool for a while then play it again and it seems to work fine. On the same note, when it's cold, it seems to pop in and out of spitting out sound. When I first start my car, it sometimes turns on and off (at around 30 second intervals) for 3-4 minutes. I know the amp is on because I still hear the alternator whine.. I'm not really sure what to do about this.. Has anyone else had this problem before, or know what I can do about it?