Remember, we are speaking of audo cliches. The most consistent is the claim of an improvement that can only be heard on some systems by some folk, at best. The 'removes veils' sort of comment that most folk cannot duplicate on real world gear or with normal ears.
I am not saying such audible changes do not exist, just that many are of the semi wishful thinking sort.
I have posted before that I have never heard a megabuck system properly set up and playing for the Gods. perhaps odd system changes in such a system IS very much apparent. I just doubt the tweak or toy of the week really has that much effect on most folk's systems.
I do believe in better than provided cables, good contact cleaners, and the inherent sound improvement that is possible in higher priced gear with higher priced parts and better engineering and build quality. I have never heard any difference using tweaky vibration gear, magic wall wart power cleaners, CD polishers, or changes in turn table mats, and I have tried them all.
A clean record, basic decent cables, and a dedicated electric line have had audible differences. Even that ultimate, take it on faith, piece of gear, the Shaki stone, had an effect I can hear (in it's absence as I lost it in my last move). I have one of the new high end fuses on order for my amp. I will se if that does anything at all.
In this best of all possible worlds, if I had the money make $5K in changes, I would buy the new Bryston CD player, a PS Audio B stock power generator, and about a grand in media.