• Country
• Australia

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

• Year
• 1960–1962

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 314524

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 4 inch = 10.2 cm

• Material
• Various materials

• from Radiomuseum.org
• Model: Hi-Flux 50004/4MA/3 - Manufacturers Special Products

• Notes

•                         MSP Hi-Flux Speaker.

  Size	4"
  Preferred Standard	50004/4MA/3
  Voice Coil Impedance at 400 C.P.S.	3 Ω
  Assembled Speaker Resonance C.P.S.	180 ± 20
  High Frequency Response C.P.S.	5,000
  Peak Power Handling Ability (Watts)	3.0
  Minimum Total Flux (Lines)	17,500
  Minimum Flux Density (Gauss)	7,500
  Nominal Voice Coil Diameter (inches)	¾"
  Baffle Opening Diameter (inches)	3¾"
  Mounting Hole Centres (inches)	4 11/16 P.C.D
  Maximum Depth (inches)	1¾"
  Weight when Packed	1 lb.
  Superseded Type	20801/4PW/3

• Price in first year of sale
• 1.80 AUS £

• Mentioned in
• Mingay's Price Service (Feb 1961 to Feb 1962.)

• Literature/Schematics (1)
• - - Manufacturers Literature (MSP Hi-Flux Speakers Data Sheet.)

• Author
• Model page created by Martin Kent. See "Data change" for further contributors.

• Other Models

• Here you find 19 models, 14 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