Gordon Culp, (who I believe had passed away) was a high energy physicist from Cal Tech who designed a 26 variable computer optimization program.

They were constructed with little regard to cosmetics (they were usually painted flat black), but had a (for then) very solid build.

The original tweeters were Peerless paper, later, around 1974, they went to the Philips mylar dome.

They were made in Chatsworth, California.