the 20.7 must designate that similar technology is used throughout these models now.
Magnepan announces the 20.7
Jacob Heilbrunn has a first look on The Absolute Sound's site.
"But here’s the skinny: no other speaker at this price will offer even remotely similar lifelike performance, and it should—no, will—scare the bejeezus out of most of its competitors. It’s no accident that Audio Research, which I also got to visit, has 3.7 loudspeakers as part of its reference system. So go ahead. Search for another loudspeaker. But I can only wish you good luck. I defy you to find one at up to five times the cost with the scale and realism of the 20.7."
http://www.avguide.com/blog/first-listen-magnepan-s-new-flagship-207-loudspeaker
"But here’s the skinny: no other speaker at this price will offer even remotely similar lifelike performance, and it should—no, will—scare the bejeezus out of most of its competitors. It’s no accident that Audio Research, which I also got to visit, has 3.7 loudspeakers as part of its reference system. So go ahead. Search for another loudspeaker. But I can only wish you good luck. I defy you to find one at up to five times the cost with the scale and realism of the 20.7."
http://www.avguide.com/blog/first-listen-magnepan-s-new-flagship-207-loudspeaker