Speaking of radials, I’ve long hankered after a pair of these. But they are slightly too expensive and deserving of better electronics than I’m prepared to pair them with for the dining room so I expect they’ll never happen.
From a design aesthetic I really love the look of Franco Serblin’s designs from the Lignea and Accord. Of course I can’t mention his later designs without including the upper end Sonus Farbers.
Combine isobaric and transmission line loading. First section is a sealed tube with woofers at each end, one firing into the tube, the other firing out. Then the transmission line (cannon) is bolted in. Things are used to supply base reinforcement in stadiums.
Of course the net is full of pictures of living rooms with 4 mounted on wall or hanging from the ceiling. I’d be very suspicious of the structural integrity of any domestic property after using these.