Synergistic Red Fuse ...

 Wolfie ...

I'll say it again for the umpteenth time ... I am a salesman and not an engineer. I do not care how the fuses work, only that they do. Its a mystery to me why you continue doubting in the face of all of the positive comments in this thread ... all 74 pages of it at this point.  I suggest that you call Ted Denny at SR and ask him how they work. He's the designer and the engineer and most likely has all of the technical jargon to satisfy your curiosity. 

Frank

I completely concur with backgroundblur's assessment of the Black fuses. So well said.

As I peck this out, I'm enjoying Bruce Cockburn's Dancing in the Dragon's Jaws AIFF CD rip. Enveloping. Stunning bass...

I don't "continue doubting" as I did a comprehensive test after doubting, and verified what I suspected: Fuses don't, and should not, do anything but pass AC through them (in both directions which is what AC does) and melt if needed when  designed properly (properly in this case means rated to a standard, which SR fuses seemingly are not). If you think you hear any sonic improvements from 'em, it's imagined or from something else, although for many it seems "imagined" is clearly enough.

Listener testimony here continues to confirm the sonic benefits of installing SR Blacks in AC mains, rails and, in my case, Maggie 3.6R tweeter and midrange signal paths.  The conducting materials in the SR's are superior to the tiny filaments in ordinary fuses.  The evidence reported here over these past months, however anecdotal, has overwhelmed the insistence of the skeptics and outright deniers that we cannot be hearing what we are reporting.  
Wolf, you just revealed how your own expectation bias worked in your system--this time against hearing SR improvements.  You say you had doubt going in and you came out with nothing, a conclusion you hold as a basis for telling us we are imagining things.  You are simply not qualified in telling anyone what they are or are not experiencing; you can be right only in terms of your own experience.     

Jafreeman, I’m sure most reasonable people will acknowledge that "expectation bias " is applicable to both positive and "negative " positions. . You can certainly be convinced that something is not possible and this adamant mindset potentially inhibits the possibility of fair and open minded assessment.

If one were to take a very strong and repeated stance that a given product offers no value or improved performance if could be quite difficult to approach this product with any degree of genuine objectivity. In this scenario the mind is already made up.

It can be difficult to step off a soapbox and admit that you were wrong. Not an impossible task but definitely not easy either. Is it possible to try these Black fuses and hear no difference? Yes. But to accuse those who do hear improvement as simply suffering from expectation bias (which is possible in some cases) the converse is just as valid for the deny campers  as well. 
Charles