Hi-Fi Tuning Fuse Holder

LMAO Skeptic! That's great!

Where does it end? What about the connection at the panel , meter fitting , service cable , utility transformer. Getting crazy 

SKEPTIC is awesome !

Bingo ! 

Ditto!  

Brilliant ! - Love that

The mechanics of a breaker is shown in this video

The arcing across the breaker points appears to leave significant surface damage .Potentially inhibiting current flow and increasing impedance.If a CB has tripped  a number of times over the life of the unit then this alone could prove detrimental  to audio sonics , making a case for replacement  

     Are components for European style Mains boxes, compatible with those designed for the USA?

                                         I don't believe so.

     The fuse and holder shown are very similar (DIN rail mount/design-wise) to many I've seen, installed in the electronics/power supply panels of newer industrial machines and plating equipment*.

 *ie: https://www.eltron.pl/files/photos/producers/52956cb27a1a0b150eb9dd84faf445d882d7fc26.pdf

            Are HIFI's being distributed, in the US of  A?

https://www.hifi-zubehoer.shop/en/hifi-tuning-sicherungshalter-32a-ohne-sicherung-a-36459.htm

Got to admit, I am not inclined to try it. Maybe that’s where I draw the line.

It has its supporters though. From a Six Moons review:

“So? Out with the old calculator: The mains fuse including mount is €36, add five component fuses for source and amplification and another €80. The noise killer clocks in at €99 for a grand total of €215. What else would net such improvements for so modest a sum? A good speaker cable? Perhaps but depending on your rig, this might barely buy you a mono lead. Room acoustics? More gains for sure but two close-out corner traps won’t get you far - and more money you haven’t got to spend. Hmm, I come up short on options. Considering the sonic improvements, the money HiFi Tuning charges for its products (especially the fuses) seems more than fair, even cheap considering certain criminal crap which litters this sector. Hey, just four lousy Eso footers cost more for crying out loud...”

A word of caution- make CERTAIN that the HiFi Tuning Breaker WILL fit your panel as it is NOT a universal fit type breaker.

There isn't a need for a review, if you're a fuse tweak apostle.

How could there NOT be a profound SQ improvement-the metal parts are cryo'ed !

Try it and see and then you can review it.