And George, whatever...
Whatever back at you sunshine.
This is the only reason to change a fuse and not to expect some magical increase in sound quality.
This is all potential fusers need to know, forget the "snake oil’ being preached.
As this is what happens to any fuse (including the "snake oil" ones) that have seen too many turn on cycles, it’s called fuse ageing with "switch on surges", as there’s far more current goes through it at the moment of switch on than any other time, as it has to charge up empty power supply caps ect.Cheers George
That’s why fuses and light globes can blow (if nothings wrong) at time of turn on surge, here are some pics of fuse ageing.
A slow-blo fuse "ageing" right to left
https://peakpinball.com/wp-content/uploads/2013/01/fuse-8312-640x426.jpg
A fast-blo fuse "ageing" left to right
https://i.stack.imgur.com/0uqWX.jpg%20
Just change your tired old fuse/s for the same quality $2 ones that were in there. Forget about the "snake oil fuses" for $600!!! + for 4