I am having an unusual problem with my sound system. All four door speakers will cut out randomly. When this happens, HU is still on and sub and amp are still working. Any suggestions on the problem?

 

If all four are cutting out, I'd check your wiring on the back side of the radio for possible shorts. Past that, I have limited knowledge.

 

check ground wire, remote wire, rca's

 

Check all 4 spks. One of them is grounding.

 

Found the problem. It was the driver's door speaker that was grounding out on door frame. I had changed the speakers about two years ago and one of the connections was bad causing the wire to gound out when it contacted the metal door. Thanks for the help guys.