a few years ago I replaced my speakers and cd player in my 93 YJ. I followed the directions to the tee and the speakers sounded blown. I checked all of my connections, fueses and the grounds, and they all checked out. unfortunatly the next day I had to get on a plane for japan for 3 yrs. I come back and the issue is still unresolved. I will be purchasing new speakers and a cd player, any hints on how I can avoid this delima again?