• País
• Gran Bretaña (GB)

• Fabricante / Marca
• Lowther Manufacturing Co; Kent

• Año
• 1954

• Categoría
• Altavoz, cascos o auricular

• Radiomuseum.org ID
• 340615

Haga clic en la miniatura esquemática para solicitarlo como documento gratuito.

• Gama de ondas
• - no hay

• Tensión de funcionamiento
• No necesita alimentación

• Altavoz
• Ø 8 inch = 20.3 cm

• Material
• Materiales diversos

• de Radiomuseum.org
• Modelo: Lowther Driver Unit PM3 - Lowther Manufacturing Co; Kent

• Forma
• Chasis (tambien de autoradio)

• Anotaciones

• Lowther PM3

  This  8-inch twin cone driver unit was of a radical new design.

  The PM3 was specially developed for use in the Lowther TP1 corner enclosure. It incorporated one of the largest magnetic structures in use on loudspeakers.

  The PM3 driver was not sold separately.

  The design incorporates a dome-shaped member rigidly mounted to the centre pole and is described in Donald Chave’s US Patent 2,808,895.

  This member acts as a non-magnetic mechanical crossover filling the space inside the tweeter cone which provides air loading to the cone. This permits the smooth transition of low and high frequencies without dips at the crossover frequency. See Patent for a more detailed explanation.

  Specifications

  • Frequency range: 20 - 22,000 Hz
  • Gap Flux: 22,000 Gauss
  • Power Rating: 25 Watts
  • Impedance: 16 Ω 

• Mencionado en
• -- Original-techn. papers. (US Patent 2,808,895)

• Autor
• Modelo creado por Gary Cowans. Ver en "Modificar Ficha" los participantes posteriores.

• Otros modelos

• Donde encontrará 56 modelos, 51 con imágenes y 2 con esquemas.
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