There was only one wire developed years ago 80’s for audio that I believe was directional. That was Linear Crystal Oxygen Free (LC-OFC) speaker wire from Audio Technica, it was heated up to such a degree it crystalized when it was drawn.
The only problem with it, it could not be bent much at all, otherwise the cystalized copper broke and then created resistance gaps between the crystal gaps. it was like glass, if this happened it became worthy of the bin. I still have some here, sounds like crap because of being abused too much.
http://coregar.c.blog.so-net.ne.jp/_images/blog/_a8b/coregar/LC-OFC_SP.jpg?c=a0
http://auctions.c.yimg.jp/images.auctions.yahoo.co.jp/image/ra115/users/4/5/8/9/aloha7_99-img600x495-1468317494bwpckk2375.jpg
Cheers George
The only problem with it, it could not be bent much at all, otherwise the cystalized copper broke and then created resistance gaps between the crystal gaps. it was like glass, if this happened it became worthy of the bin. I still have some here, sounds like crap because of being abused too much.
http://coregar.c.blog.so-net.ne.jp/_images/blog/_a8b/coregar/LC-OFC_SP.jpg?c=a0
http://auctions.c.yimg.jp/images.auctions.yahoo.co.jp/image/ra115/users/4/5/8/9/aloha7_99-img600x495-1468317494bwpckk2375.jpg
Cheers George