Foundation: danholt loudspeaker factory in Düsseldorf

Development, manufacture and distribution of high-quality loudspeakers for high-end hi-fi and stage from own production.

From 1986, development and manufacture of the danholt Bumerang turntable. The boomerang is a turntable for analogue records. Discovery of geometric resonance optimisation as a design and construction principle in this context. The magazine "Stereoplay" confirms in a test the excellent metrological values due to the geometry.