just recently me speakers keep cutting on and off. all my speakers went except for my sub. i turned off my car and started it again then my sub and rear speakers worked. i would do the same and my fronts will work then cut off. what is causing this? i am running a Pionner Z2 deck with Infintiy speakers using the stock Bose amp. would it be my amp?

 

Maybe something is loose..make sure all connections are secure. I don't know what else to suggest.