This is an electrostatic column speaker, 6' tall and costing $6000/pair. An integral, fan-cooled amplifier is located in the base. The 2SW is said to cover almost the entire frequency range and is based on a patent, number 3,668,335, issued to manufacturer/designer Harold Beveridge on June 6, 1972. Internal acoustic lenses in front of the electrostatic panels widen the speaker's dispersion: In the Beveridge literature, it says "This 6-foot high device consolidated the entire frequency range into a vertical line source, and uniformly disperses it over a horizontal pattern, 180 degrees wide. The beaming characteristics of the high frequencies are ingeniously translated into the same dispersive pattern as the low frequencies, creating a perfectly balanced cylindrical sound wave front."
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In their seminal work on the subject of audio "Bluff your Way in Hi-Fi" (1987), Sue Hudson and John Crabbe stated that "the perfect speaker would have no mass and no dimensions. The perfect speaker does not exist, and if it did, it still wouldn't." One might add, as a corollary, that a speaker with zero dimensions would also have infinite cost. At least there seems to be a trend in that direction. The Wilson WATT and Celestion SL700to use today's two most visible examplesmay have attracted considerable attention because of their exceptional performance, but they have also attracted at least as much because of their price/size ratio. Even in a considerably "lower" price bracket, a "simple" two-way loudspeaker with a 6" or 7" woofer costing $1000$2000/pair would, at one time, have had most audiophiles laughing themselves silly.
