Based on S16 prototype these loudspeakers were commissioned to participate in a US audio research project, the Princeton University 3D3A (3D Audio and Applied Acoustics).
See 3D3A measurements of R16 here.
DIYAudio discussions here.
The 3D3A Lab was founded in 2008 by Professor Edgar Choueiri with a research grant he obtained from the Shostack Foundation to study fundamental aspects of spatial hearing in humans. The laboratory became operational in early 2009 and was completed later that year with the addition of an instrumented anechoic chamber.While I had not heard the research's results the goal is very ambitious. Imagine watching a 3D movie without those polarised glasses -- this is what our normal Stereo listening is like. The research attempts to bring those 'glasses' into the audio world, hence the left and right ears receive correct sounds correspondingly.
Done correctly, the result would be the holy grail of recording and listening to music. Get a pair of headphones and listen to this recording and this to get some ideas what could have been achieved.
Outdoor measurement to determine directivity
Princeton 3D3A published measurement results of the R16. They have very generously published results of 25+ other speakers too so audiophiles have a rare chance to look at independent party investigation on loudspeaker performance.
I am mostly happy that my outdoor measurement (using ironing board!) closely resemble the lab results. It validates that outdoor measurement with cheap microphone is sufficient for our hobby.