Don Keele's Circular-Arc Speakers
The Chicago Show was my second opportunity to hear the unique circular-arc line array speakers designed by legendary audio engineer Don Keele, who was for many years the speaker reviewer at the long-gone Audio magazine. The 5'-tall CBT36 covers a 36° vertical arc, and with its 72 ¾" tweeters and 18 3.5" midrange units, all sourced from Dayton, projects a tailored wavefront that both allows for a very wide sweet spot from where a stereo image can be perceived and doesn't fall off with distance in the usual manner. The speakers used a DEQX digital crossover and were being driven by an Acurus amplifier. They were operating down to 45Hz, below which a subwoofer took over.
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