4 radios blow in 2 months WTH

[southport2014 10+ year member]

if you are still using the factory wires for power if there was a short the fuse would be popping. is it the factory amplified system? what kind of amp are you hooking up full range or sub or both

Think it was my ground a friend put my ground in for me and he didnt sand I looked I had to sand it to bare metal im assuming this is this problen