Clarity!! You won't notice a huge change but it's a good tweak.
"Wrapped it in aluminum foil"
I don't know what you intended to accomplish, but it sounds like by wrappiong the fuse in aluminum foil you may have disabled the purpose of a fuse. I assume this was a temporary thing, just to see how it would sound to bypass the fuse, but in case not, if you have a need for the fuse it won't work and you'll damage the amp at a minimum, could damage the speakers, and worst case scenerio you could cause a fire and burn down the house!