Greetings!
So... I bought this house in Seattle and found these speakers built into the built into the 1960's era 16 MM movie theatre, complete with movie library and a few other Frazier speakers and turntables and a HUGE volume of records. I had no idea what they were until I located this thread here in the Klipsch forum. Dixielanders!
I missed the chance to corral the Mac 4100 that drove the system for 30 years so I am currently ressurecting some old HH Scott tube tuner/tube amp equipment that was buried in the closets. The speakers work fine but I haven't settled into a good system to drive them yet. They don't need much power, the movie projector runs them without any help at all.
I will post more as I get time to listen to them a bit more...