Please stop. You're just embarassing yourself at this point.
Electrical power lines don't even use copper, they're made of aluminium to make the cables lighter, thus requiring fewer pylons and making the pylons themselves lighter. The electricity "from the street" has been carried hundreds of miles through aluminium, then to a substation where it is carried through commodity grade copper to the junction box on your street from which more commodity grade copper gets it to your houses electrical box (Which also uses commodity grade copper on it's connections), from which it goes through yet more commodity grade copper to your outlets.
And you're telling me that after all of that low spec material, using 1m of cryogenically treated ultra super mega copper is going to change the properties of your home electricity? It's horseshit and you know it.
"Ultra high end audio users" in your post can be considered synonymous with "gullible idiots who have been sold magic bullshit by audio companies".
Anyway,
@delshay, here's a great video that will educate you on why digital audio really is digital:
You will note he is using lab equipment more than capable of reproducing even inaudibly tiny differences in the signal.
No doubt the 
