Introduced in '74, I think it was, the FMI (Fulton Musical Industries) 80. The 80 was also used as the mid-range driver in Fulton's Model J, a modular, 3-cabinet speaker system with RTR ESL tweeters on top and a separate bass cabinet. One of only a few really wide-range 20 to 20,000Hz speakers at the time. I sold my Magneplanar I-U's to get a pair, and wish I still had both! Whereas the "East Coast" sound (voiced as flat FR, but a little reserved/polite and dry) of Advents and AR's competed with the "West Coast" sound (FR less flat, forward, dynamic and brash) of the JBL L-100's and horn speakers, all the Fulton speakers had neutral FR and a liquidly transparent sound. Fulton the man also made great recordings, some of the best I've ever heard. He was a little ahead of David Wilson at both recording and making speakers, but was older and died not long after making a big splash.