Your kidding, and let "snake oil" and "voodoo" companies flourish, with posts from shillers for those same companies here on Audiogon??? NOT LIKELY!!!!!!! No matter how nice you ask, and it was nice!!
There are plenty of the correct forums for them and you to visit
https://www.google.com/search?q=snake+oil+forums&oq=snake+oil+forums&aqs=chrome..69i57.7881j...
https://www.google.com/search?q=voodoo+forums&oq=voodoo+forums&aqs=chrome..69i57.3710j0j15&a...
To those "non technical" (like yourself) members that are interested, do not listen to fusers, listen to the techs of this industry that design the audio products you have.
AND YOU WON"T SEE THEM ON THREADS LIKE THIS AGREEING WITH WHAT THESE FUSERS SAY IT WILL DO FOR THE SOUND, EVER!!! LET ALONE BEING DIRECTIONAL!!!!!
Just clean and tighten your fuse holder and re-new your fuse (if old) with a good quality 50cent Bussman, Littlefuse or similar.
As with "many switch-on surges" they do deteriorate, bend, stretch and get crusty with electrolysis formations on their fusible wire elements before they give out, as these pics show of a fuse wire element ageing over time show. https://ibb.co/9NbTwqK
(even the $$$ boutique ones will age just as much also)