• Country
• Germany

• Manufacturer / Brand
• Isophon, E. Fritz & Co. GmbH.; Berlin

• Year
• 1966

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 223170

• • Brand: Isophon

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

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 30 cm = 11.8 inch

• Material
• Metal case

• from Radiomuseum.org
• Model: Rund-Lautsprecher P30/31A - Isophon, E. Fritz & Co. GmbH.;

• Shape
• Chassis only or for «building in»

• Dimensions (WHD)
• 300 x 130 x 300 mm / 11.8 x 5.1 x 11.8 inch

• Notes

• Lautsprecherchassis, 4,5 Ω, 10 W (18 W_Spitze).
  Frequenzbereich: 35-8000 Hz, Resonanz: 55 Hz,
  10000 Gauss / 60600 Maxwell.

  Bezeichnung vor 1966: P30/31/10;

  Variante: P30/31/10T = Frequenz: 30-6000 Hz, Resonanz: 45 Hz, Impedanz: 4 Ω, Nennleistung: 8 W, DM 56,- (ARLT 1964/65).

• Net weight (2.2 lb = 1 kg)
• 1.770 kg / 3 lb 14.4 oz (3.899 lb)

• Price in first year of sale
• 51.00 DM

• Literature/Schematics (1)
• Rimpex-Katalog, 1966

• Author
• Model page created by a member from D. See "Data change" for further contributors.

• Other Models

• Here you find 252 models, 241 with images and 32 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Isophon, E. Fritz & Co. GmbH.; Berlin