• Country
• Australia

• Manufacturer / Brand
• Manufacturers Special Products Pty. Ltd.(MSP); Sydney, NSW

• Year
• 1954–1961 ??

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 311590

• Main principle
• Audio-Amplification

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 12 inch = 30.5 cm

• Material
• Metal case

• from Radiomuseum.org
• Model: 12" Speaker 12PU/3-21580 - Manufacturers Special Products

• Shape
• Chassis only or for «building in»

• Dimensions (WHD)
• 310 x 310 x 125 mm / 12.2 x 12.2 x 4.9 inch

• Notes

• Has an Impedance of 3 Ohms

  Was previously designated as type AU78.

• Net weight (2.2 lb = 1 kg)
• 0.365 kg / 0 lb 12.9 oz (0.804 lb)

• Price in first year of sale
• 2.85 AUS £

• Author
• Model page created by Joshua Boxer. See "Data change" for further contributors.

• Other Models

• Here you find 14 models, 9 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Manufacturers Special Products Pty. Ltd.(MSP); Sydney, NSW