hey whats up names kevin, i have a 1991 metallic steel blue corvette, im having troubles with the delco/bose radio they come with, if the volume is all the way low but not off it makes a wierd phftpphft noise kinda like static and every once in a while it squeels really loud nebody have any ideas what this may be, weve taken the headunit out and all the soldering is fine and theres no corrosion so im thinking its either in the wiring, or in the amp because all the speakers are fine we checked them in another car, help would be greatly appreciated, thank you

 

The same squeal turned out to be the rear amps in my 86