of digital microphones, KM D, based on the KM 100/180 series. In 2005, Neumann began production of its first dynamic microphone, the BCM 705, for the broadcast industry. Neumann was acquired by Sennheiser Electronic GmbH in 1991. Production of Neumann microphones was moved into a newly built level 100 cleanroom factory in Wedemark, near Hanover. The company maintains its official headquarters in Berlin. In 2010, Neumann introduced the "KH Line" of studio monitors, based on products from Klein + Hummel, a company from Stuttgart founded by Horst Klein and Walter Hummel in 1945, and bought by Sennheiser in 2005. In 2019 their first headphones were introduced, the NDH 20. See also List of microphone manufacturers List of studio monitor manufacturers References External links Mix Online Magazine on Neumann's 75th Anniversary Manufacturers of professional audio equipment German brands Audio equipment manufacturers of Germany Microphone manufacturers Manufacturing companies based in Berlin Electronics companies established in 1928 1928 establishments in Germany