directional cables?

I would reverse them every day, that will keep those lazy electrons on their toes!
Seriously, Bill is correct, that is how the manufacture intended them to be used. But if you happened to like them the other way the polarity police will not be knocking on your door.

All cables are "directional" meaning that due to variations in the plug quality, soldering and/crimping etc. they will probably sound different when reversed. Usually this difference in inaudible or minute in scale. As I suggested even ones designed to run in one direction MIGHT sound better reversed. Also, they appear to require some time to readjust themselves when reversed, not being an expert on virtual photon exchange I would not attempt an explanation of this but it has been noted by various writers.

I don't want to argue the theory, I was just reporting the results of various experimenters. In the article "an Idiots Guide to Cables" in the Nov/Dec 2008 edition of HIFICRITIC Chris Bell describes a series of experiments he performed with various DIY cables. He was attempting to match or exceed the quality of various high quality commercial products. He reached several interesting conclusions, among them that "conductors don't have directionality; however, I did find that there were sound alterations while reversing cables, due to tolerance variations with plugs and sockets." Having read much the same elsewhere I assumed that it was another case where the actual world varies from our theoretical expectations.