This is a reprint of an original Review from 1973.This review is audio history! The amazing Heil Air-Motion driven speaker from ESS! What a technical breakthrough! Collected today and very rare, here is the 1973 review done by Leonard Feldman. A piece of audio history! This review has a full test of the product, full specs, and commentary. I have many more ESS Ads and Reviews on my Ebay Store. THANKS!      

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