Certain capacitors and resistors made by various manufacturers have been shown to actually make the "sound" better. For the Engineer, as long as the specifications for that capacitor meet their design requirements, they are good-to-go. However, if they have the time and knowledge, they would try other cap manufacturers as is the case now a days and either place them in their product initially or "upgrade" to them later. It is now science, not snake oil. It is a known fact that certain capacitors and resistors are simply better in the sound of the equipment. But, that wasn't always the case. So, I have no idea if audiophile grade fuses are snake oil or not, as an Engineer, I can't see how that would make the slightest difference in the sound coming out of the equipment if it meets the same specifications as any other fuse. But, the same could have been said for capacitors and resistors. Other than percent tolerance, actual resistance value, power rating, what other measurement was there? But, it turned out that some really did affect the sound. So, maybe "audiophile grade fuses" can do the same. Many, Many years ago, I didn't believe that interconnect cables really affected the sound. Boy was I surprised on blind test and A/B comparisons on equipment to hear differences. I swapped "higher quality" cables in my system and yes, there is a noticeable difference in sound. So, for fuses, mayhap that just hasn't gotten to the various equipment manufacturers yet. Give it time. It is really does affect the sound to such an extent that is should be incorporated in the final design/manufacture, it will be.
enjoy
