There is a man in Norway with a remarkable collection of vintage audio. I belive he has all the models of JBL that is worth knowing something about. From Paragon to the new K2`s, Everest, L300 and so, to mention some few models.
He is probably one of those in the world with best knowledge about JBL vintage speakers.
There was a report about him in a norwegian magazine this month. I will see if I can get in touch with him a bit later on this spring, and see if I can get a meeting with him and make a repport about his collection for you guys.
Here is a few pictures from his collection of electronic equipment.
http://www.audiophile.no/artikler/nebyhifi.html
Leif Arild