I have two amps, one for subs and one for speakers. I just hooked up everything for my speaker amp with a correct ground (metal to metal) power cable (+ side) and remote. While hooking it up i had the - disconnect and the fuse out, so when everything was ready i put the fuse in the holder and connected the negative terminal and the fuse instantly blew, but not the sub amp fuse? Also, i dont know if this is a dumb mistake because i havent hooked up two amps in the same car before, but i put the ground wires in the same place and thought that might have been it so i made them have two separate ones but havent tried with a new fuse yet. The amp is a sony 600 watt four channel model # xm-gtx6040 if that matters. Any help would be awesome, thanks-jesse