Why don't you hook them up to your speakers and find out for yourself? I do know the 4pr are not 10 gauge.
Kimber Kable
Been clearing out various audio components/accessories hiding in my basement unused for the last 20+ years. Came across a 15-foot pair of Kimber Kable 4pr purchased in the early eighties. Kind of shocked to see this stuff is still in vogue. And expensive. My question before potentially departing with it: is this cable materially better than 10 GA gauge speaker wire? Meaning can you really hear a difference?