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Welcome to SDS Labs, we have been rebuilding the Quad Electrostatic Loudspeakers (Quad ESL) for over twenty years. These loudspeakers are in many ways still state-of-the-art even more than 45 years later. We rebuild the original ESL's as well as the ESL-63's and newer Quads (988, 989, 2805, 2905, etc) to original performance or better. SDS Labs provides component rebuilds including power...
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About Audiostatic, a maker of pure full range electrostatic loudspeakers. After about 40 years, Audiostatic is still one of the most innovative producers of durable full range electrostatic loudspeakers. The first Audiostatic loudspeakers were showed and demonstrated to the public at the 1974 Firato Audio Show in Amsterdam by its Dutch designer Ben Peters. Progressive development and innovative...
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ESL Repair brings you the finest in electrostatic loudspeaker parts and repair service. We can repair many of the electrostatic loudspeaker built over the last fifty years. ESL Repair brings you the finest in electrostatic loudspeaker repair service. We can repair many of the electrostatic...
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The definitive web reference to the original Quad ESL. The history of this amp's circuit starts twenty five years ago when Julius Futterman, understanding the limitations of the output transformers. patented an Output Transformerless design. The clarity of the sound has been unsurpassed to this...
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Design and consultation in electro-acoustics. Fundamental concepts of sound reproduction in rooms. Detailed design information for DIY construction of a subwoofer and an open-baffle speaker with exceptional fidelity. Dipole loudspeaker design for true to the original sound reproduction with...
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Because we started out with a clean canvas we had the freedom to design to our wish list which has led to a very nice loudspeaker. The panel has grown in height a little going from 440mm to 505mm, width has reduced from 168mm to 150mm. The panel thickness has reduced from 8mm to 5mm allowing a very slender frame to be used. As with the 440 mini panel, the 505 ESL panels are supplied ready to be...
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