• Country
• Great Britain (UK)

• Manufacturer / Brand
• KEF Electronics; Tovil, Maidstone, Kent

• Year
• 1971 ?

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 178805

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
• Various materials

• from Radiomuseum.org
• Model: Bass/Midrange Unit B200 SP1039 - KEF Electronics; Tovil,

• Shape
• Miscellaneous shapes - described under notes.

• Dimensions (WHD)
• 245 x 210 x 108 mm / 9.6 x 8.3 x 4.3 inch

• Notes

• A low/midrange unit with visco-elastic damped Bextrene diaphragm and high temperature coil assembly.

  Recommended enclosure volume: 20-25 litres with enclosure closed.
  Load capacity: 80 watts.
  Impedance: 8 ohms.
  Frequency range: 25-3,500 Hz.
  Voice coil: 32.6 mm.

  Tief/Mittel-Töner L-S mit viscoelastisch bedämpfter Bextreme-Spezialmembrane, hochnachgiebiger Aufhängung und Langhub-Schwingspule. Chassis-Korb aus ausgestanztem Blech.

  Empfohlenes Gehäusevolumen: 20-25L bei geschlossenem Gehäuse.
  Belastbarkeit: 80 Watt.
  Impedanz: 8 Ohm.
  Frequenzbereich: 25-3.500 Hz.
  Resonanzfrquenz: 25 Hz.
  Magnetische Induktion: 12.000 Gauss.
  Magnetischer Fluss: 117.000 Maxwell.
  Schwingspule: 32,6 mm.
  Mechanische Güte: QM=4,4.
  Elekrische Güte: QE=0,5.
  Gesamtgüte: QT=0,45.
  Findet u.a. Anwendung in KEF Reference 104 und in Boxen anderer Hersteller (Celef Studio Professional A, Monitor Audio M4A).

• Net weight (2.2 lb = 1 kg)
• 3 kg / 6 lb 9.7 oz (6.608 lb)

• Source of data
• - - Data from my own collection

• Literature/Schematics (1)
• - - Manufacturers Literature (KEF Datasheet B200 Specification Number SP1039)

• Author
• Model page created by Peter Zimmermann. See "Data change" for further contributors.

• Other Models

• Here you find 36 models, 35 with images and 10 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from KEF Electronics; Tovil, Maidstone, Kent