Rim
I have seen those; a reasonable entry-level attempt. Various things to correct, not too many mistakes made, but the right idea in general. Ribbons in the open from 15oo up can rule.
12-15 inch HempTone coned JBL 2110/2115's in Ripol doubles, each side, for dynamics. Sealed bass? Someone missed the point. The Kill Zone of dipole sound is <1500Hz, so where the rubber meets the road, those speakers are sealed in a box. Wings are fixed, I believe. At an angle that would suggest horn-loading, depending on Fs back radiated. Active equalization using Rane RPM, and bi-amping essential. I find all that good wood garish, ostentatious, a shrine to squandered human resources, and conspicuous consumption. I like the 626's ALOT; always have. LIke all the other VMPS, in fact.
The DarkStar still takes the OB cake, in my opinion; all issues were addressed. I learned the science, ran through the calculus for myself, distilled the wisdom, and got it right the first time. BTW, Dr Linkwitz concurred with my object notes....