unlabeled in-wall CL2 speaker wire - which is postive?
I'm trying to add some new wire to an existing, older installation of in-wall speaker wire.
The old stuff is likely CL2, is brown and has no distinguishing marks regarding positive/negative designations.
I can't even tell if each side of the old wire is shaped differently, which would make it easy to determine.
Is there some subtle way that older (35 years) in-wall speaker wire was made to make identifing pos / neg easy? If not, any suggestions on how to figure this out?