Chashas1,
Well said.
I do not pretend for a moment to be an expert. I base my opinions on an education at, in my day, a top ten engineering school, experience in the audio retail industry, and my personal experience as an audiophile. I am knowledgeable, but not perfect.
I know that I have not tried the audio fuse. Of course, this is the big hole in my argument. If I had the means to do so for free, I might. However, my argument is that it is absurdly priced, and that it has no technological basis behind it.
In my system I can clearly hear the difference in tubes, capacitors, cables, and power line conditioners, among other things. I would make a gentleman's bet that the fuse I put in it would not make a difference. I would do that in any system because it has no basis in engineering principles. (I would also bet real money on it, if my opponent required it.) Of course I understand that the argument is that high end audio and engineering are at odds with each other. I hold that that need not be. I believe that sound engineering principles, if the designer were to pay attention to the minutiae, would coincide with great sound as far as an audiophile is concerned. That is the basis upon which I have built my system, and upon which I modify my amps.
Having worked in the industry, I witnessed a lot of snake oil being marketed. This was especially true of accessories where there is the highest profit margin. I am very skeptical of accessories and tweaks. Forty dollars is an exorbitant price too pay for something that most likely costs pennies to make. It seems that what you are paying for is perceived value and mystique. That is the only conclusion that I can draw when no one, including the sellers, can offer some technical principles for the supposed improvements on which this product is based.
I understand your Julian Hirsch comment. I am open to trying new ideas. However, I still maintain that there is a rational and scientific explanation to improvements in the music coming from the speakers. So far, there have been none concerning these fuses.