@richardbrand I am not a physicist nor do I own speakers that only accept spades. I'm certainly not going to argue that Furutech's marketing makes any sense. In fact, I would agree that it sounds more like nonsense. And if you read what I have written,you will find that I haven't expressed any opinion about the cables other than noting that they sound different depending on which end is connected to the amp and which end is connected to the speakers.
I believe there have now been 12 people that have responded to this thread and not a single one actually knows anything about these cables and I suspect most of them haven't ever bothered to compare cables in a highly resolving system. But all of those people seem certain that they actually know some sort of absolute truth, but without being in possession of any actual experience or observations that would lend any credibility to their assertions. Curious isn't it?