August 05, 2025
The Legacy of QUAD Electrostatics
In 1957, Peter Walker introduced the Quad ESL‑57, the world’s first full-range electrostatic loudspeaker. It was praised for its clarity, transparency, and lifelike midrange sound.
Successive models, such as the ESL‑63, refined the design with innovations like concentric‑ring stators, improved power handling, and better structural integrity.
Critics consistently praised the ESL series for its open, box‑less presentation and natural tonal neutrality. This reflected