Adam
Great stuff!

I love this kind of rubbish!
I have a friend (and demon bassplayer) who takes all that stuff very seriously indeed. When we ridicule him, we are challenged with the 'so you know better than these people, I suppose?' defence. He buys anything expensive that says it'll improve his sound. When I tell him that 'root and fifth sounds pretty damned good on any old sh*tty gear' I am liable to have to duck to avoid flying inanimate objects.
If you bought him a bottle of snake oil, he'd fry his sausages in it before you could say 'victim' - and insist they taste better than extra-virgin

.
Anyway - my mains cables give off a better class of 50Hz hum than his
Your cloth-eared friend, Colin