• Year
  • 1970 ??
  • Category
  • Loudspeaker, headphone or earphone
  • Radiomuseum.org ID
  • 271784

 Technical Specifications

  • Wave bands
  • - without
  • Power type and voltage
  • No Power needed
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)
  • Power out
  • 20 W (unknown quality)
  • Material
  • Special material, described in the notes.
  • from Radiomuseum.org
  • Model: Poly-Planar P-20 - ERA Acoustics Corp.; Moonachie
  • Shape
  • Chassis only or for «building in»
  • Dimensions (WHD)
  • 300 x 355 x 35 mm / 11.8 x 14 x 1.4 inch
  • Notes
  • "poly-planar" loudspeaker. Impedance 8 ohms. Frequency range 40 Hz - 20 kHz.

    The membrane is made of styrofoam, mounted in a rigid plastic frame.

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