And the one who will decide which is snake oil and which is notAll the brilliant electronic design engineers that designed every piece of your equipment that you have, that’s who.
And the ones that make and sell the "snake oil" have no credits to their names whatsoever and won’t come onto forums like this to discuss their snake oil products.
Because they know they don’t have a leg to stand on with the claims made here by ones using them.
This kind of voodoo BS needs to be eradicated from this hobby
https://www.akikoaudio.com/en/akiko-audio/tuning-chips/512-akiko-audio-fuse-box-tuning-chip-english
as it's giving it a very dubious appearance to anyone that has even the minimum electronic knowledge that wishes to get into it to further their sound experience with proper equipment upgrades.