I was looking at the 3-way system, with the 15" bass, the 6"(?) conical mid and the detached 1" woodhorn/driver combo. Sorry, I simply assumed it was a Martinelli design since it appeared on his homepage. Adrian Mack's "High Effinciency Speakers" display had a remarkably similar layout, but with the horn included within the cabinet, and the midrange device is the 300Hz conical mentioned earlier.