While I am not yet comfortable revealing the speaker, I am going to share some initial test results, that are shocking to me, considering the price.
Here is waterfall, detailed FR(unsmoothed) of mid/treble and off axis response from 0 to 90 degrees horiztonal:
http://www.linaeum.com/images/speaker1/fr_waterfall_detail_offaxis_1M.gif
Here is an averaged overall 1 Meter response plot to give an idea of 20-20,000 Hz response characteristic:
http://www.linaeum.com/images/speaker1/fr_fullrange_averaged_1M.gif
Please ignore the distortion plot line; it was at low SPL(about 85dB).
I will describe physical construction:
Cast metal frame 6.5" mid-bass, composed of a stiff poly composition, large motor and large spyder. Metal alloy tweeter. 1.25" thick MDF front baffle. 0.75" thick MDF cabinet. Crossover uses very high power, large iron core inductors. Capacitors are MKT film type. Small ported 2 way, about 15 lbs each.
The off axis response is incredibly identical to on axis, even at 15khz, at 60 degrees off axis. The over all response linearity is better than many so-called high-fidelity speakers.
This speaker costs between $100-$200 per pair.
I would recommend this speaker crossed about 85-90 Hz, integrated with stereo subwoofers. Some very small modifications should be made at minimum: high quality internal acoustic fill material, some glue on some spots to prevent a vibration of certain parts, etc. Easy stuff that anyone can do.
-Chris