I am using 12 gauge solid copper core cables.and really enjoying them. They're only 3' long, so that may come into play, as they are connected to two monoblocks very close to the speakers.Equipment used on backend: Krell EV 600 monoblocks and Wilson Maxx II's. I'm also not a member of the camp that believes speaker wire is directional. I'm sure I will get many negative remarks about these opinions. I always enjoy hearing other people's opinions. If you can actually hear a positive difference, then go for it. That's what it's all about.