Hello have recieved a reply from Russ Andrews.

Hi Ben -  Russ's reply is below

Gary

Hi Ben,

 

All I can say is that cable directionality is audible enough for anyone to hear, but I have no explanation for the phenomenon. I do know that there are many steps in the cable making process that either change or set the direction. I suspect that Heaviside was right when he proposed that the signal travelled in the field surrounding a conductor ( at least that's what I think he said!) please correct me if I'm wrong.

 

Russ.

 

Russ Andrews,

Managing Director

 

If someone could look up this reference would be helpfull. Cheers Ben, will continue the research!