i have a kicker kx600.1 amp and everything worked fine for about 2 years on a couple of different cars and a pretty new amp kit until one day it just went dead. i found out that my fuses had blown in my amp and when i tried to put a new one back in the connection sparked real bad. i have a fairly good ground using the bolts connecting my back seats to the frame and everything is hooked up right. i also tried another amp and it did the same thing when i tried to put a fuse in. why would the fuses be sparking and blowing like this?