Leo Malet (August 2002): ESS Trans-Static I 3 way hybrid speakers. Uses KEF B139 oval woofer in transmission line, KEF B-110 in short transmission line and 3 RTR stat panels for tweeters. These were among the top 3 or 4 high end systems in the early 70s. They are each 41.5 inches tall, 15.75 inches deep and 19.75 inches wide. Weight: 139 lbs (each). The speaker consists of the following components:
Woofer. The Trans-static uses a flat, aluminum stressed, plastic diaphragm woofer which is totally free from cone break-up or distortion. It uses an extremely heavy high gauss magnet structure with a system resonance of less than 15hz. Midrange.The midrange features a magnet assembly larger than many 12in woofers. Tweeter.The RTR electrostatic tweeters in the Trans-static have an absolutely linear frequency response from below 1250 hz to 32 khz.
Tom Howe (December 2004: The comment about the ESS Transtatic 1 tweeters being single ended is incorrect. The RTR tweeters used were the same as the Infinity Servo Statik 1 and 1A system(s). They are push-pull units that were made with a plastic grid assembly and closely spaced insulated wires for the stators, much like (conceptually) the Sound Lab, Acoustat and Dennison units.Phil Chance (November 18, 2005):