I'm from Iran and needless to say we are stock in the middle of nowhere here (sanctions,...) so we weren't able to hear much of the horn speakers, so we started to think we should do it ourselves because we are able to obtain CDs much easier than big horns. now we are building a special Lathe Machine to turn horns, for now I've planned to do the Tractrix but I thought "why not try JMLC?" so I wanted to check if there is public free or commercial information about these horns
btw, we use Linear bearings and a pivot-guide method to scratch the MDF or natural wood. maybe some mold and then go for fiberglass
any help is much appreciated
"Nothing is better than a horn loudspeaker, well... unless two horn loudspeakers!"