It would not be terribly surprising if many cable makers did not actually
manufacture their own wire any more than it's no big surprise high end
amplifier manufacturers don't fabricate their own capacitors, resistors,
Tubes, transistors or wire, or that many high end speaker manufacturers
don't fabricate their own drivers. Nevertheless, there remain a great many
options for those cable companies that order wire, including type of metal,
purity of metal, gauge of wire, flat wire, round wire, oval wire, solid wire,
stranded wire, cryogenically treated wire, whether the wire must be labeled
for directionality, etc. Of course, the wire is not the only factor involved in
how the final product will sound. Ya got yer jacket, yer dielectric material,
yer connectors, welding or soldering method/technique, etc. Geez, it
almost seems like making cables is an art.