Here's what Darren e-mailed me a month ago:
-13-15 mm Xmax
-"lots and lots" of copper in the motor, for a roughly 1mH Le
-a pretty flat frequency response up 1k or so, about +/- 1.5 dB, albeit with significant breakup problems in the octave above that.
-target selling date of early August
Personally, I'm waiting to see what comes of it before I move on my home system.