This is authentic Western Electric cinema speaker from 1928, as presented by Mr. Joe Roberts of Silbatone Acoustics at the 2011 High End Show in Munich, Germany.
From Wikipedia: "It is a wide-audio-range horn loudspeaker estimated to be nearly 50% efficient, thus allowing a cinema to be filled with sound from a 3-watt amplifier. This was an important breakthrough in 1929 because high-powered audio valves were not generally available back then."
We feel truly fortunate to have been able to listen to and enjoy this magnificent piece of audio history.
(Note: This is authentic in-room sound as recorded with a Sony handycam; no enhancements used.)