While surifing the Danley Sound Labs website for inspiration, I have found the SM100B. It is an 8" coaxial woofer combined with 4 x 8" tapped horn(s) in one box of 52 x 85 x 48 cm, 50 Hz low end cut off (-3 dB, 30 Hz -10 dB) and 124 dB continuous output, 800 W continuos load capacity. Weight is 62 kg. I would like to hear one in person, but it seems like an engineering masterpiece to me. Especially the tapped horn part. I wonder how it is folded inside - I would guess the two tapped horns are each folded slightly differently to use the volume fully. Except for the weight, it looks like a perfect full range box to me.
I also wonder which long throw 8" woofers could be used...it would be a great challenge trying to build one. To model a single TH with 50 Hz cutoff capable of 118 dB continuous output (4 should be then 124 dB if I am correct) would be a good start. Any recommendation for a suitable 8" and/or existing TH design for a single 8"? And if used for the TH part only, would it not be more reasonable to use a 2x15" bass reflex in the same volume (with less efficiency I suppose)?
The same one that was popular ages ago: https://www.farnell.com/datasheets/2329567.pdf
