Deutsche Ultraphon Gesellschaft, Berlin 1927
Diameter 62 cm, height 74 cm (open), ca. 30 kg
Wood, two gramophone pickups, spring-driven motor
This is a record player with a spring-driven motor that operates according to the gramophone principle. It is fitted with two pickups and two horns at right-angles to each other. At 78 rpm, the second pickup has a delay of 1/15 second as against the first, the result being a sort of spatial sound effect, later referred to as “pseudo-stereo.” There were also plans to use the method for the radio using delayed switching.