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
Date Produced 1957-19??
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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