FWIW:
I had a very long run for my speaker cables (my source equipment is in a different room) so I went with Belden 5T00UP 10 awg cable (bought from Blue Jeans cable). The specs were excellent and just what I needed for long speaker cables without loss of sound quality (see review with test results):
https://www.audioholics.com/gadget-reviews/blue-jeans-10awg-speaker-cable-5t00up
I regularly listen to my pal's system wired up with more than $20,000 in Nordost cabling (he used to have my cast off speakers, too, in that system) but my system sounds darned good to me! And I think it's fair to say I'm a picky listener :-)