These ones?
http://www.earthquakesound.com/towers.htmThe chief engineer at Earthquake (Joeseph) showed them to me about a year ago, right before they debued at CES or Cedia, I forget.
Anyway, I was at Earthquake picking up an amp that I had serviced and they had the PN-4521 (the main towers and the center) in their main lobby.
I asked him to fire them up, but he didn't want to, so I only got a look at them. Very fancy finish, and he was very impressed w/ the excursion of their midrange (they did travel pretty far when he was pushing on them).
Sorry, that's all I can tell you about them.
And, yes I and my brother-in-law have bought serveral items from John, and everything's always worked out great.