I was trying to set my gains with a dmm last week but when I started to play the test tone it blew my radio fuse under the hood. I replaced the fuse but something still isn't right. My head unit will do this weird thing where every now and then when I play a song it will speed up at the beginning but slow down after a few seconds. Also my sub amp went into protect mode yesterday. It is out of protect mode now but my sub still won't play. Does anybody have any idea what could be wrong?