• Country
• Netherlands

• Manufacturer / Brand
• Philips; Eindhoven (tubes international!); Miniwatt

• Year
• 1973

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 312315

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)

• Material
• Metal case

• from Radiomuseum.org
• Model: 4 inch Square Standard Loudspeaker AD4470 /Y4 /Y8 /Y15 /Y25 - Philips; Eindhoven tubes

• Notes

• Philips 4 inch Square Standard Loudspeaker type AD4470 /Y

  Available versions:

  • /Y4:     Z= 4 Ω @ 200 Hz
  • /Y8:     Z= 8 Ω @ 200 Hz
  • /Y15:   Z= 15 Ω @ 200 Hz
  • /Y25:   Z= 25 Ω @ 200 Hz

   

• Net weight (2.2 lb = 1 kg)
• 0.085 kg / 0 lb 3 oz (0.187 lb)

• Mentioned in
• -- Original-techn. papers. (Miniwatt Copresa "Altavoces" 1973)

• Author
• Model page created by Miguel Bravo-Cos. See "Data change" for further contributors.

• Other Models

• Here you find 5250 models, 4394 with images and 3450 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Philips; Eindhoven (tubes international!); Miniwatt