Hold on you cable naysayers!!!
Who here can tell the sonic difference between the different AC cables in this recently posted youtube demo?
Funny enough, if I skip from the first "cheap" AC cable sound to the end "more expensive AC cable," I actually seem to perceive a difference, the sound of the more expensive cable seeming a bit fuller, richer.
But of course, until I actually tested them in a blind test, I would presume it's likely bias of some sort perceptual bias - e.g. having been told one sound is being played with a more expensive cable. Even just searching for differences can yield the perception of a difference, as we know.
I suppose one could to a quick blind test by having two tabs open for this video, and while eyes closed or somehow blinded, have someone else click between the cheap and expensive cable portions, to see how the guesses come out. (And even then, if one reliably identified the more expensive cable portion of the video as sounding better, you can't just trust that nothing about the making of the video wasn't playing a role).