I'm not sure Bob but I went from 18ga to this...and heard a very audible sound difference. It is excellent quality cable...and their shipping time is pretty....remarkable
I ended up going with the Carol 14 Ga in-wall from Home Depot. I am not one for cables sounding any different so I can't comment there. I can tell you this wire is color coded, has good flex and has a tough but smooth jacket. The jacket wraps the two inner insulated wires. Perfect for in-wall pulls.