Gasbaggery aside, although in this thread it would render the page virtually empty, most high end cable manufacturers make worthwhile products in gauges that are apt for nearly anything, and unless you need to run 160 feet of wire for some reason you likely need not worry about the inane minutiae proffered here. Directionality has been noted on cables for decades, ditto the understanding of copper purity, and mind numbing exclamations using obscure factoids by hand wringing self appointed "expert" worriers, offering non-issue issues for others to pontificate (or rant) about, simply harsh the mellow of the party. Buy cables from reputable companies, plug 'em in, and try to think about the music instead of musings from thin skinned geeks.