• Country
• Germany

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

• Year
• 1974–1985

• Category
• Microphone or Pick-up element

• Radiomuseum.org ID
• 153142

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Main principle
• none

• Wave bands
• - without

• Power type and voltage
• Powered by external power supply or a main unit. / 48 Volt

• Loudspeaker
• - For headphones or amp.

• Material
• Metal case

• from Radiomuseum.org
• Model: Quadro-Mikrophon QM 69 - Neumann, Georg, Laboratorium f

• Shape
• Miscellaneous shapes - described under notes.

• Dimensions (WHD)
• 49 x 290 x 49 mm / 1.9 x 11.4 x 1.9 inch

• Notes
• Mikrophon zur koinzidenten Aufnahme von vierkanaligem Ton im Quadro-Format. Richtcharakteristik 4x Niere. Ausgangsimpedanz 180Ohm. Speisung aus Netzerät NQ 69.

• Net weight (2.2 lb = 1 kg)
• 0.5 kg / 1 lb 1.6 oz (1.101 lb)

• Source of data
• - - Manufacturers Literature

• Author
• Model page created by Nikolaus Löwe. See "Data change" for further contributors.

• Other Models

• Here you find 128 models, 117 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