I don't see any other way around... 38 cm speaker + (huge) suspension : 40 cm mini. You have something like 7 cm of baffle right and left : something like 55-60 cm wide.
Two 40‑cm drivers vertically, 7–8 cm in the middle, plus at least 10 cm at the top and bottom based on what we can see: about 1 meter tall.
With three 15‑inch drivers working together plus the high‑frequency waveguide, it’s unlikely we end up with less than 80 cm of depth. (A 15 inch high excursion driver can easily measure 25-30 cm deep).
So yes, these are going to be really huge speakers, but since I regularly handle PA speakers or subwoofers with this kind of driver configuration, I was fully expecting them to be massive !
Again, in the professional world, the 8C are already considered ‘mastering‑grade’, so these speakers are clearly intended for very large rooms where they’ll be listened to at very high levels.