Something For The Fuse Guys ...

It is simple to test if your fuses are limiting something without having to invest hundreds of dollars.    Just jump them with some spare wire and have a listen.  You can even get fancy and jump them with pure silver solid or other exotic wires.    If you can't here any difference it is unlikely a fancier and expensive fuse will work.
You can decide if you want to live on the edge and skip the fuses.   I never blew an internal one in anything solid state.   

I'm just slightly confused!  Can someone explain to me which order one would change (upgrade) fuses for max benefit?  A/C input surge fuse,
DC power supply fuses, speaker fuses?  Of course testing after each
change.  

I can't imagine the AC power line fuse would make any difference. But, it does make a little bit of sense that a speaker line fuse could make some difference.

My ARC D-110B has speaker fuses, when ARC upgraded that design
with MUCH better components they also eliminated the speaker fuses.
The fuse holders (at least the frames) are still in place they are just wired straight through. Given the cost of the amp I don't think they were cheaping out on a fuse.  

barts6
I’m just slightly confused! Can someone explain to me which order one would change (upgrade) fuses for max benefit? A/C input surge fuse, DC power supply fuses, speaker fuses? Of course testing after each change.

I can’t imagine the AC power line fuse would make any difference. But, it does make a little bit of sense that a speaker line fuse could make some difference.

>>>>>Why would a speaker line fuse make more sense than an AC power line fuse? They’re both AC circuits.

I’m a "no fuse" guy, the ridiculous cost of so-called "hi-end" fuses proves a small point, the better the connection, the better sound altogether.

With the exception of my tube preamp (miniature breaker on back) and transport, 
the gear goes off at the flip of the breaker switch from the panel box, never had issues during storms or any kind of power or brown-out.

prof

If it's a normal part of being human to experience bias effects, we can expect a lot of people to experience bias effects. And so long as we are talking about people taking a "subjectivist" approach along the lines of "I don't need this to be objectively verifiable, if I hear it I know it's true" then that very approach self-selects for the pattern of people who "hear differences." They are all using the same problematic methodology. 

>>>what a load of horseman knew her. Nobody is saying that certain psychological factors aren’t real but it’s the worst exhibition of pseudo skepticism to suggest that expectation bias, pro tweak bias, placebo effect, reverse placebo effect or whatever is responsible for peoples’ results in all cases - or even 50% of the cases. OK, let’s take the worse case scenario. Let’s say bias accounts for 50% of user results. That still leaves 50,000 who actually did get good results. and we only have like three dudes who got nothing. And then there are folks like yourself who won’t even experiment to find out. Give me a break. Just another skeptic in an ivory tower.