Very cool that you've gotten a chance to use this! I'd also really like to hear some samples.
Dimensions listed in the user manual are 7.7" x 9.4" x 5.5" (195 x 240 x 140mm) and just over a pound in weight.
I Played around a couple days ago with the published dimensions, the indicated spacing between the rear capsules and the polar plots of the thing to try and figure out the internal baffle structure. See the attached image if interested in my best guess. Here's what's going on-
Polar plots across the top are
left surround, left and
center, rotated so their primary axis is aligned towards the top of the page, to compare the differences in directionality imparted by the interference tubes and baffles for each mic. The polars on the left are just coincident overlays of those same rotated images to better see the differences by adjusting the opacity of the image (hard to see it in this image). The lower left is the left surround mic with black lines indicating the primary axis (and a line perpendicular to that) and colored lines indicating the angles at which frequencies are 5 db down on the polar plot.
The main part of interest is the plan view of the mic in the lower right. The colored lines have been transferred to indicate the angles at which frequencies are 5 db down on the polar plots for the left surround and the center mic. The center pattern is much tighter at these frequencies with the interference tube, but gets less smooth (notice that the 8kHz -5 db down angle is
wider than the 4kHz angle). The white lines indicate the probable baffle walls and the angle of those is determined by a line perpendicular to the primary sensitivity axis of each mic. The yellow walls indicate possible additional baffling to impart more directionality to the surround omnis without interference tubes.
Overboard? perhaps. I had some time to waste and I like to build these kind of things so my interest was piqued.
Looks like it might go into a colonial tri-cornered job.
I thought exactly the same thing.
No one would ever notice.