Speaker cable

Just make your own speakers cables  there are plenty of formulas to try.  BTW most manufactures use Mogami wire anyway.

Shocked that nobody here knows the answer.  Lots of wrong answers.  Aluminium is my favorite one.

Lamp cord and bulk cheap speaker cable have been marked this way for decades.  It is sold as copper wire.  The silver colored one is usually made into the negative since copper seems to be reddish.  The silver colored one is Sn coated.

Nobody has ever bragged that this is superior in my experience.  it is generally less espensive to just just one red wire and one white wire then it is to mark the insulation.   I know when I was young I learned quicly to make sure the wires were coded in some way so you didn't have to get out a meter to figure out which wire was which.  Some really cheap wire wasn't marked.

Jerry

@zazouswing
I would like to see evidence that some contractor actually did that. It is true that over the years there have been different theories AND LAWS regarding what they use for conductor in wiring, but I have never heard of any contractor or Licenses electrician mixing it up like you suggest. I’m not sure it would even meet code.

Because most of us do not buy cheap China cable. 😉

Shocked that nobody here knows the answer. Lots of wrong answers. Aluminum is my favorite one.

From reading the Amazon description, both conductors a pure copper. The insulation on the negative appears to be white, the positive looks like it has clear insulation.