whart- yes I have been a coach for several years, I have coached Football, Baseball, Soccer and Golf. Also a short stint as AD.. Thankless job. Trying to get out and retire in the next couple of years.
As to your reply, I am also fascinated with the history of Audio.
I have an acquaintance in Kansas who is working on a field coil system and one of these days I’ll make the drive to the middle of Kansas to have a listen. When people discuss horns it would be interesting what the market share is but I guess you would have to define exactly what would qualify as a horn and that would open up another can of worms.