12-21 External Bakelite Spider With Felt

Rola Company (AUS) Pty. Ltd.; Melbourne

Data
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  • Year
  • 1939 ??
  • Category
  • Loudspeaker, headphone or earphone
  • Radiomuseum.org ID
  • 315857

 Technical Specifications

  • Wave bands
  • - without
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 12 inch = 30.5 cm
  • Material
  • Various materials
  • from Radiomuseum.org
  • Model: 12-21 [External Bakelite Spider With Felt] - Rola Company AUS Pty. Ltd.;
  • Notes

  • 12" Permag loudspeaker.

    Type No. 12-21
    Overall Diameter 12⅛"
    Voicecoil Diameter 1"
    Voicecoil Impedance 2.3Ω

    Superseded by PM Type 12-O.

  • Mentioned in
  • - - Manufacturers Literature (Various Rola Loudspeaker Data guides.)
  • Author
  • Model page created by Martin Kent. See "Data change" for further contributors.

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