This is quite fascinating. It looks to be a very successful design from you measurements. Do you find them lacking in any way? Are you completely satisfied?
Thank you! They are still under development (due to be released as a production speaker in Q3-Q4 2022 if all goes well), so they are not perfect yet, but getting there. The cabinet has been through a few iterations, starting to stabilize now. Need to do some more measurements outdoors to verify and test more, but it's -8C and snow here at the moment, so that part of the development is on pause.
The exact tune of crossovers and DSP will probably change too, but overall it sounds very good. I've tried to describe the sound a bit earlier in thread as well. But the soundstage, precision and imaging (depth/width) is probably among the best I've heard, some recordings sounds like they were recorded in surround. One of our core design principles to have a open and clear sound that doesn't become sharp and fatiguing, so it obviously has that as well (same coax driver as in our other speaker the SBS.1). Another prominent feature is of course the pure capacity, with a 12" midbass driver (f3 at 90hz). I can literally feel snare drums in my chest when playing loud on these speakers.
Anecdotally I've had a guy come by for a listening session who have 10,000USD Piega speakers, and another who just bought the B&W 803D4, they were both impressed by the sound.