I have a 25 Grand Speaker setup, Fuses were the most bang for the buck upgrade I was able to get. Being the tinkerer I am, I figured out how to make my own fuses for 3 dollars a pop that compete with ones being sold for $250 each.
All you need, is some epoxy glue, Silicon Dioxide and some mineral oil. Mix the oil and silica into a fine paste, fill the fuse cylinders, use epoxy glue to put end caps back on, let dry... and you have the cheapest most substantial upgrade to your audio system.
Best fuses to use are ChiFi aucharm fuses, they go for 2 dollars a piece....about.
End caps can be pulled off
with the proper tools.