i have a 99 mustang gt vert with the mach460 factory system. my drivers side tweeter (i think) or possibly the door speaker will cut in and out at random times. but it does it like every 15-20 seconds and sometimes last 1-2 mintutes. its really random really. not really sure how to fix it or what to look for.... im thinking about just adding a set of components since the speakers are 10 years old. but i would like to try and fix it first since the speakers are still good.

 

go to the mechanics. he can only help you.