One of the first pair of speakers that really got me thinking and thought were beyond anything I had heard before were the Elipson 4040, made out of plaster and of two separate elements, one sphere for the medium and treble and one column for the subwoofer. It ended up being used as a monitor for the French National Radio, ORTF.
The clip below encapsulates the technical prowesses of Joseph Leon, its founder and chief engineer, as well as his "form follows function" phylosophy.
I was to try to duplicate this concept in the 80s in a much smaller package, intended as an upgrade to the basic loudspeakers supplied with the MIDI systems, all the rage at the time, because of the smaller size of most modern appartments, but also because they incorporated the new CD technology in a compact system.