The horn looks a ridiculous shape to me and the opening from the back chamber vast.Classic "audiophile" back loaded horn with back chamber behind the driver (OK-ish) and too small horn mouth (fairly common). Actually, it is a sort of hybrid between horn and Transmission Line - fairly common in the hi-fi world. The Real back loaded bass horns comes from Professional audio:View attachment 94841
Just to put some perspective:
View attachment 94842
The horn mouth is that of a mid-range horn, but the match to the back chamber completely odd.
Looks like a speaker designed by eye by a stylist rather than by an engineer based on physics to me...