I came across this old article from 2005 and was sucked in because well it's about Pink Floyd. About 2/3 into the article , page 17 , they started talking about cable direction, even the mains grounding, sounded different according to direction?
https://www.davidgilmour.com/press/2005/march/TapeOp_March05.pdf
But even more surprisingly,
we said for a laugh, let’s just turn the cable around the other way and see if we can hear any
directional difference on the technical earth cable. And we couldn’t believe it, but we could.
https://www.davidgilmour.com/press/2005/march/TapeOp_March05.pdf