by Matthew Kennedy
In 1980 we received US Patent 4,231,446 (Resonating chamber) for a loudspeaker cabinet derived from 4-dimensional geometry. It provided better bass, lower distortion,and omnidirectionality with standard components. It never made us rich, and now that the patent has expired we are publishing this book so that anyone can learn how to construct their very own hypercube speakers. Fact, not fiction!