• Country
• Germany

• Manufacturer / Brand
• Neumann, Georg, Laboratorium für Elektroakustik GmbH; Berlin

• Year
• 1956–1966

• Category
• Microphone or Pick-up element

• Radiomuseum.org ID
• 283023

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Tubes
• 2

• Valves / Tubes
• AC701k AC701k

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Details
• Remote Control (with wire or wireless)

• Power type and voltage
• Powered by external power supply or a main unit.

• Loudspeaker
• - For headphones or amp.

• Material
• Metal case

• from Radiomuseum.org
• Model: Stereomikrophon SM2c - Neumann, Georg, Laboratorium f

• Shape
• Miscellaneous shapes - described under notes.

• Notes

• Stereo condenser microphone with remote-controlled polar pattern.

  Polar pattern for both capsules can be varied between omni and fig-of-8 in 9 steps.

  Design: 2 x KM56 capsules and electronics installed in one tubular case, 30 mm. diameter. Designed for use in coincident stereo microphone techniques (X-Y, M-S and Blumlein)

  To be connected to NSM, NSMa, or NSKt power supply. Do not use NSMa23!

  SM23 is a slightly different version with different pinout. It can be connected to the NSMa23, a battery power unit or 2 separate power supplies (N52t) as well. 

• Mentioned in
• - - Manufacturers Literature (Neumann history (PDF), page 4)

• Literature/Schematics (1)
• - - Manufacturers Literature

• Author
• Model page created by Matti Adolfsen. See "Data change" for further contributors.

• Other Models

• Here you find 128 models, 118 with images and 47 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Neumann, Georg, Laboratorium für Elektroakustik GmbH; Berlin