Synergistic Red Fuse ...

I think they would be worth a try if for no other reason, a comparison to the SR Black. 
;-) 

A retail dealer informed me that VAC audio only uses high quality ceramic fuses and does not recommend ordinary glass Bussman or Littlefuses.  Sure it's not black SR fuses, but VAC wants to make a profit and finds better quality, lower cost ceramic fuses are minimally adequate to protect their gear and sound good.  VAC amps are high end in build quality and sound quality.

Stock fuse in my VAC SigMKIIa SE is glass.  I've spoken to Kevin rolling fuses, he encourages me to experiment and report my results to him.

More noble sound? What the heck is that? Sweeter treble? Lower and more saturated bass? Unlikely, or more to the point, likely having zero to do with the fuse, but if these things did occur I want to know WHY the fuse made this possible. I'm reminding my fellow posters to consider the fact that a fuse is NOT an "active" component…it's a fuse…allowing electrons to pass to and fro until it melts due to an otherwise unforeseen emergency. Asking this "why" question is bullying only to the extremely insecure or those who've invested themselves emotionally (and financially) in this nonsense, and again, there's nothing negative involved is posing the question. Incidently, this STILL remains unanswered, which should be at least of some interest to anyone considering buying any expensive but relatively suspicious tweak. I hope this gentle and considerate post doesn't push anybody into emotional overload.

Now all you cheap skeptics ain’t got no excuse. Deluxe Create Audio Nano fuses direct from China $9 each. Select your own rating. eBay to the rescue! Packet delivery from China $2. Cannot beat with stick. Tell all your friends. At that price even Wolfman will be able to hear them. Well, let’s not push it.

sidebar to Wolfie: it figures that the term sweeter treble is not in your vocabulary. What do they teach you at audio engineer school, anyway?

I posted 'auxinput's' contribution from another thread earlier about how the signal is about 98% A/C voltage and no one has shot that down yet. Glossed over maybe, but not disputed. 

Taking that into consideration (at the very least), doesn't it leave open the 'weak link' aspect of the fuse? Just to consider it doesn't mean you've fallen prey to some devious aspect of marketing. Granted, there's a lot of hype that's right up there with the Amazing Randy but THAT'S the marketing side of things. I can see where everyone's BS meters go off when they read the 'science' behind it but that's a case of throwing the baby out with the bathwater. 

Like teo_audio points out: a solid copper bar will ruin you forever once you've heard what it can do and have to put that fuse back in. That tells me that a better made fuse should improve the sound. I could care less about the theories behind the marketing claims. I just know better made fuses work because I've heard them for myself. And  yes, they shouldn't cost as much as they do. I can see an argument for that, and I'd support it, but not the efficacy of better made fuses.

All the best,
Nonoise