We Need A Separate Forum for Fuses

trelja - the fuses in a speaker are going to be operating with a valiable voltage depending on the volume, so they will, as I suggested in my post above, be skirting very close to their blow point at times and will therefore be prone to dissipating some heat, so I would expect some voltage drop and a notable difference in the sound - the increased heat and resistance will throttle the current available to the speaker and this is likely what you can hear.

However, the fuse in a power supply or on the supply rail of an amplifier is not exposed to such variation - it’s handling a DC supply, rather than an AC signal. Let's leave fuses in your AC 120v / 220v supply aside for now.

There is a big difference between the behavior of supply current and signal current and fuses will behave differently with each.

I thought your tweeter story was fascinating, but I would doubt whether the expensive fuse would sound better than the regular fuse - however I can see why no fuse would sound the best!

I've tried three different brands and they all had their own sonic signature and each brand sounded better in one direction over the other.

Just curious if you were able to detect a sonic difference between brands an/or changing their direction via a blind or double blind test.

"That would be something" 

I, personally would never bother to upgrade the OEM fuse in any actual electronic equipment. Digging around to find them, then the correct rating.. Too much bother.
However my speakers (Magnepan) have fuses in the signal path for midrange and tweeter.
In those locations I have used aftermarket fuses. I have also bypassed them to achieve even better results.
I have no ax to grind for those who do like to swap fuses in electronics.

No need for a fuse forum. What is badly needed is a waste recycling cooperative for all the crappy unreliable finicky electronics that sound different with every fuse replacement. Either that or a technician needs to recognize the opportunity to provide services to fix all those terribly designed power supplies that ensure you only hear the fuse rather than the source recording.

Just the other day someone claimed to have spent $7000+ on fuses in order to try to fix the sound of their system. I am certain that for this kind of money a completely new and well designed power supply could be installed in the users problematic equipment.

"I am certain that for this kind of money a completely new and well designed power supply could be installed in the users problematic equipment."

Right on!