Yeah, that's Jürg alright, totally unconventional and eccentric.
And yes, I owned them since the original silver ones, lost them, and replaced them with the later black ones, from 1978, and still going on strong!
For me, these are the best vaccine and cure for the dreaded Harman target curve that has plagued the modern free world for far too long. These just sound right from the moment you put them on. OK, they do need more than "just a few minutes" to charge, the 1st time you fire them up.
Regarding the form, Jürg wanted something to remove the musicians from inside his head, hence the term "earspeaker". Think ultra nearfield monitor.