Quad

ESL-57

Speaker

Main Details
Maker Quad Brand Acoustical Manufacturing Co. Ltd. Company
Function
Additional Model ID Quad Electrostatic Loudspeaker
Form Factor Floorstanding
Signal Path Analog Hardware
Made In England
Date Produced 1957-1985
Dimensions
(H × W × D)
Weight 35lbs
Power Source 100-120VAC, 200-250VAC, 50-60Hz 6W
Frequency Response 45Hz-18kHz
Additional Specifications
Treble Push-Pull Electrostatic
Midrange/Bass Push-Pull Electrostatic (x2)
Impedance (40Hz-8kHz) 30-15Ω
Dispersion (Horizontal) 70°
Dispersion (Vertical) 15°
Maximum Output (In Room) 95dB
Roll-Off 18dB/octave
Recommended Amplifier Power 15W
Power Handling (Peak) 33V
MSRP (1958) £52 MSRP (1977): £240

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