Happened to see this on "How It's Made" earlier today.
https://www.theabsolutesound.com/articles/mbl-101-x-treme-omnidirectional-loudspeaker
http://www.mbl-northamerica.com/mbl-101-x-treme/

Just crazy, but would love to hear these things!
The pictures don't do it justice compared to watching it being built in HD.

"Those who preach the myths of audio are ignorant of truth."