Quad ESL 57 Electrostatic-Loudspeaker

Acoustical Manufacturing Co. Ltd, The; Huntingdon

  • Year
  • 1956–1981
perfect model
  • Category
  • Loudspeaker, headphone or earphone
  • Radiomuseum.org ID
  • 99287
    • Brand: Quad

 Technical Specifications

  • Wave bands
  • - without
  • Power type and voltage
  • Alternating Current supply (AC) / 220 Volt
  • Loudspeaker
  • Electrostatic Loudspeaker (high bias DC voltage)
  • Power out
  • 15 W (unknown quality)
  • Material
  • Various materials
  • from Radiomuseum.org
  • Model: Quad ESL 57 Electrostatic-Loudspeaker - Acoustical Manufacturing Co.
  • 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
  • Mentioned in
  • High Fidelity Jahrbuch 1967/68
  • Author
  • Model page created by Ernst Erb. See "Data change" for further contributors.

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