Wow, that Curtis Mathes makes the "single wide" color one in another topic seem small!
I love the small CRT you have for the Fada project. And, "unobtanium electrodynamic speaker"... I have a 630TS that had been converted to a video monitor at some time, and a video-level control or something was mounted
through the speaker grille cloth. I tried some kind of speaker as part of my repair attempts around 1980 but got no sound. Now I think I know the main reason why. I will have to look at the Photofact manual closely at some point and figure out how to make a PM speaker work in there. I do not remember if the audio-output transformer was even still there.