Well, amazing, all the odds and ends of speaker 'cabinet' designs coming out of the woodworks. Some more familiar, some not so much.
Many van der Steen (vandy) fans I notice. His creations have come a long way, I understand. Thus since I had the opportunity to pull the 'sock' of one of his then creations. Pretty weird, not my thing, leaving quite an impression though. 😊
As for side firing woofers... bass, as we surely have heard is *not directional*.
Expanding sphericaly - non-directional, yes?
Two side-firing woofers (toward each other), actually reinfore themselfs.
The reason why Dieter Burmester had favoured that principle, he'd said. RIP 2015.
Woofers then also not too close to the floor! As this would interfere with additional bass 'off timing' floor-reinforment.
Lastly, surely all noticed, percussions/the drum sets, are practically always residing in back of the leading action. Why?
So it socks you not right in the face... front firing?
BTW, I have the B961 x-over displayed on my system, apparently Linkwitz type, but clearly seperate high/mid and bass portion and with plenty Mundorf caps + bypass-caps, and resistors (Mills and Kiwame).
So, 🔥... 😉
Michélle 🇿🇦