The ability to hear soundstage, depth, and imaging is not innate; it is an acquired skill that must be learned.Nonsense. Attend any live acoustic venue and it is immediately obvious.
The problem I, as a skilled designer and listener, is that all the sonic claims for fuses occur all the time without doing anything. How many fuzers change their B+ fuses in situ in the rack with the power live? It's been known for decades that merely replugging a system can have beneficial effects. see http://ielogical.com/Audio/WinterBlues.php
Turning off and on a systems totally changes the thermal profile of the amp and speakers. Said thermal profile is audible.
Fuzers claim that blind testing is invalid. Decades of experience dictates otherwise.
Fuzers can give no electrical reason. Hell, at least cables have LCR properties which can be measured and correlated with changes with properties of various kit.