Need help .I installed a kenwood Kac m1804 .digital amp on my motercycle. Every thing worked great. Until I accidentally touched 2 off the speaker wires together.heard a pop. Now everytime it blows fuse on bike .The fuse in the amp didn't blow which I thought it was there for. I am certain problem is in the amp.Did not think speaker wires could ruin an amp . Advice please . Tks in advance.