speakers and sub cutting in/out. help!

hey guys! a friend has been having some problems with his system. last week his sub would cut in/out and the speakers would play on normally. but now his speakers don't work anymore but his sub does. his speakers are powered by the headunit and the sub is obviously amped.

today he took the fuse out of the power cable to the amp and unplugged the rcas. his speakers still weren't working until he jiggled the front right speaker and then all of a sudden all four speakers played again.

any ideas? thanks in advance!

Has he checked all the wiring for the speakers?
Sounds like there is some loose wiring some where in the circuit.
Also it wouldn't hurt to check the grounding for the headunit as that could be an issue too.

Reduce the gain of the amp. It might be using too much power or something, then it decides to shat it self and the amp turns off. Just reduce the gain on the amp and see what happens

i had that problem as well at work
means that the front rite speaker wire the positive and the negative is touching each other...rechek it