U 77
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Common name: Neumann U 77
Production Status: Discontinued / Vintage
The U 77 is the large diaphragm microphone belonging to the “fet 70” series, the first transistorized microphones family manufactured by Neumann. It has the same classic shape of the U 67 and U 87 microphones and, like these, it is a switchable multi-pattern microphone offering omnidirectional, cardioid and bidirectional polar responses. It also features a switachable -10 dB pre-attenuation pad and “roll off” filter for proximity effect compensation. The microphone pre-amplifier circuit employs FET transistor (field effect transistor) with very high input impedance for condenser capsule coupling. The U 77 requires DIN 45 595 (today known as DIN IEC 268 15) that is a 12 V DC powering via modulation leads, also know as A-B, T- powering or modulation lead powering. Alternatively the microphone can be powered from a 9V battery placed inside the microphone. It uses the same K 67 capsule fitting as the U 67 microphone. The U 77 microphone was manufactured from 1968 to 1974.