The secret to a great amplifier...

As noted above, I am all for people testing fuses, just test them, with only your ears, and not your eyes. Get someone to help you so you can eliminate bias. Then maybe we can put this topic to bed.

By the by, there's a video on YouTube by Paul McGowen where he talks about fuses and it meets your very same requirements. In it, he tells of a friend of his who's doing something to one of his amps away from Paul, who's sitting some distance away, both talking audio.

Now Paul has no idea what his friend is doing, who tells him to just sit there and listen. Paul never knows if something is being changed or not, when prompted, or what it is that's being changed. Every single time he's asked if he hears a difference for better or worse, he's correct in his assessment. 

Turns out his friend was swapping out a fuse.

All the best,
Nonoise

Is fuse rolling a thing now?

To Rip Van Winkle, maybe.

I feel like I walked into a QAnon subreddit black hole.

Couldn't have said it better, myself.

I did, and thanks for noticing. 👍

That’s exactly what the OP is pitching.

if I wanted to make some bucks, I’d put these is cheap OEM compnents and start letting the accolades and purchasers come calling. 

I believe that was snark, but, please, feel free to jump on anything you can to bolster yourself.

All the best,
Nonoise

Stick a fuse, any fuse, in a crappy amp then come back and tell us the amp is now great.

I don't think anyone's said, or even inferred, that.
As far as segues go, it's better than most.

All the best,
Nonoise

One needn't spend $160 on a fuse to get better results. Why is it that naysayers always base their premises on esoteric prices when a fuse at 1/3 the cost will have an effect? You can spend even less and still hear a difference.

Also, why is it that there's always a flock, group, gaggle or pod of newcomers that stirs this subject up and thinks themselves to be oh, so, relevant and witty, as if this decades old subject weren't already debated and laid to rest?

All the best,
Nonoise

Unicorns and fairies.....what a pertinent analogy, and typical of a naysayer.

These same engineers say that the fuse cannot impact the sound but that correct orientation of the fuse in the holder can affect the sound. Well, which is it? If all it is is a sacrificial device and it's placement in the design of the amp doesn't matter, why does the fuse holder not having that exact grip on the fuse matter? How can a speck or mote of anything on the fuse end cap make a difference if for the same reasons a fuse can't?

I would contend that a fuse made of highly conductive metals, on the order of what you'd find in a cable or trace, would have more effect than the god awful, non conductive metals used in a bog standard fuse, and that that would account for a greater difference in what possibly couldn't affect the sound whereas that speck or mote of dust would. 

Why does using a solid bar of copper result in better sound? Don't do it, but many have tried it and reported back about it for decades. Why do amp designers go to all the trouble of designing a great sounding amp, only to have to add the fuse element afterwards, as an after thought, and find the amp to not sound as good as before?

With all those E.E. degrees comes a lot of conventional wisdom about the role of the fuse, but not the possibility of it's contribution to the sound, since it's role is that of a sacrificial one. To do so in such a blithely ignorant manner without trying it for oneself, to see if a difference can be heard, is an insult to the first and greatest scientific method: direct observation.

All the best,
Nonoise