Lowther Driver Unit PM4
Lowther Manufacturing Co; Kent
- Country
- Great Britain (UK)
- Manufacturer / Brand
- Lowther Manufacturing Co; Kent
- Year
- 1951
- Category
- Loudspeaker, headphone or earphone
- Radiomuseum.org ID
- 340640
Circa 1972 Catalogue
- Wave bands
- - without
- Power type and voltage
- No Power needed
- Material
- Various materials
- from Radiomuseum.org
- Model: Lowther Driver Unit PM4 - Lowther Manufacturing Co; Kent
- Shape
- Chassis only or for «building in»
- Notes
-
Lowther PM4 Drive Unit.
The PM4 was the top drive unit in Lowther's alnico range.
The PM4 was sold with the very expensive Lowther-Hegeman cabinet.
Specification:
- Flux density: 24,000 gauss
- Impedance: 15ohms
- Frequency range: 20Hz - 24,000Hz
- Power handling: 6 watts
- Total flux: 385,000 Maxwells
PM4 drivers are fitted with special cobalt alloy pole pieces. (From 1972 catalog)
- Net weight (2.2 lb = 1 kg)
- 8 kg / 17 lb 9.9 oz (17.621 lb)
- Mentioned in
- Wireless World (The), London (WW, 79) (Dec 1951 Page 74)
- Author
- Model page created by Gary Cowans. See "Data change" for further contributors.
- Other Models
-
Here you find 56 models, 51 with images and 2 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Lowther Manufacturing Co; Kent