My first experiment with fuses was back in the late 70's early 80's.
Peter Aczill ,the Audio Critic stated that the speaker protection fuses were detrimental to the sound.
He advised to bypass them for better sound.
I have been doing that ever since, using chunks or speaker wire, solid and stranded in place of fuses .
Then I tried the Iso cleans and moved up to the HiFi Supremes which I use in all my gear.If there's a fuse in the system it's a HiFi Supreme.
I now have peace of mind besides better sound by going to upscale fuses.
I used to go at it with the non believer sceptics and offered to give some fuses at no charger for them to try.
No takers, even when they were for free!
The canuucks were so sure they wouldn't do any good, I guess they felt it would be a waste of time to even try them.
Their loss.
A few years later and things have settled down.
Some of us have moved on, enjoying the stuff that shouldn't make a difference, and others are still debating if spending anything more than 50(CDN)cents a foot for speaker wire will make any difference.
I am fortunate to have an open mind.
I like to try things and then decide if they do or do not make an improvement to my sound.
I don't make up my mind that they can't make an improvement because of something someone has said.
The show me the proof types feel that tube rolling is OK, but fuse rolling is not.
The real scientist's always do the experiment to prove or disprove theories.
Somehow I think the non believers missed the part of the science class that said "do the experiment" first and then post your findings.
Or maybe they felt back then that they already knew all there was to learn.