I’ve got these vintage Isoda HA-20 “hybrid” speaker cables. Info is very scarce and probably mostly in Japanese
They sound pretty nice, so I decided to cut away the resistive banana connectors. Now, to my surprise, there appears to be one part copper, one part silver and one part something that really does look like GOLD.
Could it be gold, since wouldn’t that make these very valuable? I haven’t even today heard of but one manufacturer (Stealth) using gold in speaker cables.
What else could it be, that is the color of gold? Or just a plating, if so, why?
As it’s labeled a hybrid cable, the trio of Cu, Ag and Au would certainly make sense… It’s meticulous Japanese design, the conductor strands are actually “twirly” in shape. Might affect inductive interaction between the strands?
There was an article that suggested Isoda designs were actually what were a sort of precursor to the quite famous Auditorium 23 cables…