What is the science behind audiophile fuses?


There were many threads on the topic of "audiophile fuses" on this forum, and I sure don't want to open old wounds and trench warfare. The fuse on my preamp blew suddenly two days ago, which prompted me to search for a replacement. That's when I came across the term "audiophile fuse" and the fact that they demand far-out prices. Deeper curiosity brought me to several other fora, where users posted glowing praises about their Zero fuses and other exotica. Now I am a scientist, but not a physicist or electrical engineer: so please enlighten me! How can a fuse have an audible influence on the signal, when the signal does not even pass through it? How can a fuse be "directional" when it deals with alternate current? I mean, if I recall my university physics, a fuse is basically a safety valve and nothing more. Am I completely missing an important point here? My scientific field is drug discovery, and because of this background I am thoroughly familiar with the power and reality of the placebo effect. I that's what I am seeing here, or is it real physics? I need objective facts and not opinions, please. I really appreciate your help!

 
reimarc

@mitch2 I have disassebled and inspected the SDFB.  It is the equivalent of a magnetic breaker.   It sounds like you understand the difference between a magnetic and a thermal breaker.  a thermal breaker has a resistive heater that may be worse than a fuse for sound quality.  

So before the SWFB, I tried very hard to find a suitable magnetic breaker that I could adapt to replace the fuse and I couldn't find one.  So SDFB, designed and built one and did a very nice job. 

Jerry

Hey, hey, but they can prevent NOISE from LEAKING into your GEAR! ;-)

Dude, there are $1500 Ethernet cables that are apparently "reduce jitter"... Right in the new Music Direct catalog.

@carlsbad2

"So SDFB, designed and built one and did a very nice job."

In our world, $400 for "a very nice job" on something that is actually useful should probably be considered a bargain.

Even if I find the right breaker, finding/buying a suitable box and putting it all together would take hours and even more money. In the end, it still would not have the self-resetting capability of the SDFB. I will probably break down and buy a couple of them for my monoblocks. I would like to consider removing the IEC from one end and hard-wiring a decent power cord pigtail, if that is possible.

That is certainly possible. eliminate the fuse holder is always a gain.  the fuse holders have to be a metal that has spring so they are often a poor conductor. 

Jerry

Re: blowing audiophile fuses. One of my tube preamps will blow a touchy audiophile fuse if the amp's feeding component (dac in this case) is turned on while turning on on the tube amp. In this situation the dac is first turned off before turning on the preamp. This has ended blown audiophile fuses.