@jafreeman
From what I can tell from testing cables so far is that you want mass. After hating my Audiquest 14 gauge side by side cables that should have satisfied Magnepan's directive, and getting Benchmark's, 11 gauge equivalent, and liking them I decided to test what I had laying around. Some of that was an industrial grade 10 gauge extension cable, and a 4 gauge one. Mass matters. I am theorizing that since the signal doesn’t go through the wire, that the signals from the amp require maximum throughput capabilities for minute bursts of energy, regardless the length of the peak power output. But if anyone knows that, it's a closely guarded secret.
And no, Magnepan has to charge less for it's speakers because they require $10,000 worth of watts output. How is that saving me money?
But I could now write a book on this, an example being: Regardless of the cables gauge, the ends of multistranded cables have to be tinned to the connector that attaches to the binding posts on both ends. And if you are using Magnepan's steel ones, you should tin the cable with no addition at least, however if you tin a copper tube over the end of the cable to match the inner diameter of the sockets, there is better definition.
This makes sense when you view the signal from the amp as a field of energy, and any restriction of the signal carrier diameter as something that deforms that signal. And don't ask about the interior wires on Maggie’s, I had to rip that crap out and replace it with Cardas Chassis wire, 12 gauge. Does owners for the bass, mids and highs. But with no inductor on the bass panel, it's trying to be a full range driver itself.
And everything you do to get bass out of Maggie makes you aware of how deficient the 1.7i's are in midrange and highs.