Neumann M49
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The Neumann M49 is a large diaphragm condenser microphone from the German manufacturer Georg Neumann GmbH . It was the first microphone with a remotely controllable directional characteristic .
Development and technology
The M49 was developed in cooperation with the Nordwestdeutscher Rundfunk (NWDR). The patent was filed in 1949, and it was introduced in 1952. It was the first microphone ever with a remote-controllable directional characteristic. This is achieved by two membrane systems mounted back to back, the modulation of which is added in different phase positions . The remote control potentiometer system was developed by Herbert Großkopf from the NWDR. An M7 double-membrane capsule was installed, which feeds a miniature AC701k tube. The decoupling takes place via the BV-11 output transformer . The K49 capsule was installed later.
Due to the microphone capsule used ( pressure gradient receiver ), it should be noted that, in contrast to pure omnidirectional microphones ( pressure receiver ), a close-up effect occurs even when the omnidirectional characteristic is selected .
Individual evidence
- ^ Georg Neumann GmbH: Historical outline of the M49. Retrieved November 11, 2017 .
- ^ Georg Neumann GmbH: Historical outline of the M49. Retrieved November 11, 2017 .
- ^ Neumann M 49 | RecordingHacks.com. In: recordinghacks.com. Retrieved January 9, 2017 .
- ^ Georg Neumann GmbH: Operating instructions for Neumann Kodensatormikrophone M49b / M50b and accessories. Retrieved November 11, 2017 .