Directional cables - what does that really mean?


Some (most) cables do sound differently depending on which end is connected to which component. It is asserted that the conductor grain orientation is determining the preferential current flow. That might well be, but in most (all) cases the audio signal is AC (electrons going back and forth in the cable), without a DC component to justify a directional flow. Wouldn't that mean that in the 1st order, a phase change should give the same effect as a cable flip?

I'm curious whether there is a different view on this that I have not considered yet.
cbozdog
He never said that all of the impurities would align the cable direction in one way over the other, but that it would/could create a conflict, of sorts (my words).

I’ve been told by a few cable makers that there’s no such thing as 6 nines pure anything when it comes to cables, so....

That, and when an argument is made that a tiny wire in a fuse can make a difference, who’s to say that small amounts of impurities that occur in crystal structure boundaries can’t have an effect? He never said it did, but that it could, which is why he's a fan of large crystal structures that one can achieve in an easier way with single, solid core wires as it eliminates, or minimizes, the possibilities. 

All the best,
Nonoise
Here's the one thing Skoff said that really matters:
 there's no way—other than by listening to it—to determine which direction a piece of wire's "preferred" direction of signal flow may be.


Exactly.
Actually for cables manufactured by Audioquest, Anti Cables, Goertz and perhaps others you can rely on the arrows 🔜 provided on the cables since those companies control directionality for those cables. In those cases you do not have to listen to the cables both ways. Obviously, for everything else you have to listen to the cables both ways. But seriously, who really does? Not too many!  It’s also why you can rely on the fact the Audioquest high end power cords will be in the correct direction when you plug them in. Because they are controlled for directionality. Ditto the AQ HDMI cables. 
Morrow cable do the same thing indicating with an arrow  ….I think they are serious...To verify...
And furthermore...even if the 0.000001 parts of impurities acted as tiny diodes or magnets it doesn’t explain how that would affect the sound or the audio signal. Do you believe the tiny magnets or diodes pull the signal faster one way than the other? Cut me some slack, Jack!

And while I’m at it, there is no evidence that the separate strands of stranded cables would not (rpt not) be all in the same direction with respect to directionality. The reason the strands are all in the same direction is because the entire process of making wire and making cables is automated and controlled. They don’t just dump the strands in a barrel and pull them out willy nilly as needed.