I've had my new setup installed for about a week now.
Kenwood 348u HU
JBL p660c components up front
JBL GTO1004 amp
It sounds great and up until 3 days ago it had no problems at all. But then I noticed the left speakers(not sure if this includes the rear speakers) cut out completely, I turned up the volume and the sound came back through the speakers 100%. It happened again today and so I fiddled with the volume again and the problem was fixed. I'm not sure if this is a coincidence but both times the speakers cut out it was at relatively low volume, turning up the volume slightly fixed the problem both times.
Another thing I should note is that I got the new parts installed in my car separately.. first I got the HU installed.. no problems with the stock speakers.. then I got the amp installed and hooked up to the stock speakers.. still no problems.. then I got the new Components installed up front and the problem didn't occur until about 5 days later and seems to be temporarily fixable via HU volume knob. Could it be that when they installed the components they left of one of the wires in the back of the HU slightly unplugged or something? Does anyone have any ideas what it could be?
Thank you very much for any time and thought you put into helping me here.