Have never met John in person either that I know of, but would really like to.
He was owner of Tech Hifi chain back when I worked there in college. That was where I had my first exposure to OHM speakers (alongside many other popular lines of the time). I sold many (all box models, no Walsh) back then.
Even the conventional box models of his that made up most of the OHM line in the day were the best sounding there to me. Also the best value as I recall in many cases.