• Year
  • 1928/1929
  • Category
  • Loudspeaker, headphone or earphone
  • Radiomuseum.org ID
  • 228485
    • alternative name: Operadio Mfg,

 Technical Specifications

  • Wave bands
  • - without
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Geneva - Operadio Corp.; St. Charles IL
  • Shape
  • Table-Cathedral-Type (upright, round top or gothic arch, not rounded edges only).
  • Notes
  • A table model Dynamic Speaker, scientifically constructed with a sounding board giving maximum baffle effect. Beautiful in design and finished in rich walnut. Furnished with the Operadio Dynamic Unit. 6 volt D. C. $55; 110 volt D. C. $60; 110 volt A. C. $70.

  • Author
  • Model page created by Heiko zur Mühlen. See "Data change" for further contributors.

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