I have an intermittent problemmaybe once a week where no sound out of speakers in the morning . 05' 6-disc stock stereo, Navone line converter, Stinger rca cables , Mb Quart coax rear & separates in front . Amp has a display and shows 13.5 volts and no protection faults . Amp always plays later in the day , I want the amp to stay in the problem state before I take it to repair shop . Shop said they won't do anything if amp works on bench . Navone says converter is four separate circuits so he is pretty sure its good , suggested radio shack signal generator to trouble shoot . :shrug: I thought Alpine was a quality amp and had no problems before on older model . Any advice will be welcome......:headbang: