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

Thanks @tksteingraber - the SDFB looks well made with heavy wire where necessary (except to the LED).  It appears to be a breaker with a small control board, likely for the automatic reset.

If I were to use one, I might hard wire a pig tail power cord to get rid of one IEC, but I make PCs so one more short cord is really no problem. 

@carlsbad2 ,    @mitch2 ,

You guys are light years ahead of me with this stuff and I have a question for you:

If you have a dedicated line to your amp, and your amp has say 6.3 amp fast blow fuses in it, would putting a low current 6 amp breaker in your panel do the same thing? 

 

@tksteingraber

Thanks for posting the picture of SDFB.

@carlsbad2

It sounds like you’ve put a lot of thought and effort into addressing a concern from some of us. I am ok with slugs but don’t want a pigtail in the signal path so let’s see if SDFB would make a version that can be plugged directly into a component IEC.

@thecarpathian I don't think so.  but I'll give it more thought.

The breakers in your panel are a combination of thermal and magnetic.  The thermal component doesn't cause much problem because it is rated much higher so it doesn't act as a current limiter at low currents.  Lowering it to the level of your fuse would make it cause the same negative effects of limiting bass and dynamics. 

6.3A is a pretty big fuse.  You must have a big amp. If you have a big amp, with big copper coils and lots of stored energy, you may not benefit much from fuse changes or elimination.

Jerry

@lalitk I don't think anyone is now working on a version that fits into the fuse holder.  I was the most interested in that and I've moved on.  Like I pointed out, every IEC fuse holder is different so very hard to make one that works on every amp.