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Quad ESL 57 Electrostatic-Loudspeaker

Quad ESL 57 Electrostatic-Loudspeaker; Acoustical (ID = 227982) Speaker-P Quad ESL 57 Electrostatic-Loudspeaker; Acoustical (ID = 227983) Speaker-P
Quad ESL 57 Electrostatic-Loudspeaker; Acoustical (ID = 227984) Speaker-P Quad ESL 57 Electrostatic-Loudspeaker; Acoustical (ID = 738752) Speaker-P
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Quad ESL 57 Electrostatic-Loudspeaker; Acoustical (ID = 227982) Speaker-P
Acoustical: Quad ESL 57 Electrostatic-Loudspeaker [Speaker-P] ID = 227982 743x700
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For model Quad ESL 57 Electrostatic-Loudspeaker, Acoustical Manufacturing Co. Ltd, The; Huntingdon
 
Country:  Great Britain (UK)
Manufacturer / Brand:  Acoustical Manufacturing Co. Ltd, The; Huntingdon
Brand
 
Quad
Year: 1956–1981 perfect model Category: Loudspeaker, headphone or earphone
Wave bands - without
Details
Power type and voltage Alternating Current supply (AC) / 220 Volt
Loudspeaker Electrostatic Loudspeaker (high bias DC voltage)
Power out 15 W (unknown quality)
from Radiomuseum.org Model: Quad ESL 57 Electrostatic-Loudspeaker - Acoustical Manufacturing Co.
Material Various materials
Shape Console, Lowboy (legs < 50 %).
Dimensions (WHD) 867 x 787 x 266 mm / 34.1 x 31 x 10.5 inch
Notes

The Quad ESL 57 was manufactured for a long period because it was not easy surpassed for real quality sound. 93 dB/Wm. Impedance 15-30 ohms, frequency response 40 - 20 000 Hz (other source tells 45 - 18 000 Hz). Max. 33 Volts. Built-in DC-supply for polarization. The follower was ESL 63, followed by ESL-989. "Quad" is still producing and offers a homepage: quad-hifi.co.uk
Price given is for 1967/68.

Net weight (2.2 lb = 1 kg) 17.7 kg / 38 lb 15.8 oz (38.987 lb)
Price in first year of sale 1'095.00 DM
Collectors' prices  
Mentioned in High Fidelity Jahrbuch 1967/68

Model page created by Ernst Erb. See "Data change" for further contributors.



All listed radios etc. from Acoustical Manufacturing Co. Ltd, The; Huntingdon
Here you find 22 models, 22 with images and 14 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.




  
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