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[Κώστας Φ.]

Ενδιαφέρον άρθρο από τον Dick Olsher του TAS (αναδημοσίευση στο avguide).

We begin our journey circa 1957, the dawn of the stereo age, with the introduction of the first full-range electrostatic loudspeaker (later known as the ESL-57) by Quad Electroacoustics. Although the principles of electrostatic transducers were already well established, it was the lack of suitable diaphragm materials that constrained its commercial development. The advent of Polyethylene Terephalate (PET) films made the Quad’s nearly massless moving diaphragm possible. (Nowadays almost everyone is familiar with such films as Mylar, DuPont’s original trade name for this material.)

Peter Walker’s pristine “window” onto the orchestra did justice to Quad’s motto: “The Closest Approach to the Original Sound.” And it quite remarkably remained in production for 28 years. I’m not sure whether it was a question of Quad having set the bar too high in the midrange or the industry’s infatuation with the frequency extremes that focused development effort for the next 50 years on woofers and tweeters. Certainly, from a marketing standpoint, the new notion of high-fidelity sound argued for extended frequency response.

Διαβάστε ολόκληρο το άρθρο εδώ: avguide.com