Mmm . . . I dont have any explanation either, I aint that clever, but I know it is a fact and one has demonstrated it many times over the years when testing for dirctionality, some cables are more obvious than others. May be you are cleaverer than I and can show 'practicaly' that cables are not directional? See there are two sides to the coin, it all comes down to practicality and ears.
I dont realy care, I know what I can hear . . . some cables, speaker and interconects, seem to be directional, almost having a positive and negative end?
As much as I cant show technicaly why this should be so, the doubters have never shown me practicaly it aint so, they can produce techno speak, and theory that does suport the no direction idea. I know what I know, I trust my ears and they tell me the phenomonum exists in some cable to a lesser or greater degree.
I cant see why its a problem? How dificult is it to do a quick listen and swap over end for ends, listen again, if no change, thats fair enough, if there is a differance you then decide which you prefer . . . very simple, aint it?
Then again perhaps the listening ears aint so good? . . . or the hifi is not up to scratch . . . who is to say?
Hifi has always been practical fact against technical theory . . . in my book the practical usualy wins, practical in terms of 'ears'. Figures often dont match to what is a good sound to an individuals ears.
CJSF