Silverbulet

I just bought a set of JBL GTO 8628 speakers for my 03 Supercrew and all four of them crackle if you crank it up. I am confused because this is the second set. Now when I refer to cranking them I don't mean killing them with bass and turning them past an extremely loud point. They are suppose to be top notch but I just don't see it.

Anyone have a better experience with a better 5x7 please share. I'm starting over and Id like to match up the whole system.