The copper part is fine but the dielectric is a bit of a problem because of dielectric absorption, which is increasingly problematic with frequency. You really want something like teflon or at least a good polyester.
I run ESL's which require a series input resistor, so I use open-to-the-air nichrome wire as speaker cable which tunes the system at the same time. The result is, you might say, no speaker cables at all!
I run ESL's which require a series input resistor, so I use open-to-the-air nichrome wire as speaker cable which tunes the system at the same time. The result is, you might say, no speaker cables at all!