stereonomono - Hi Fi Compendium - 13 years on-line: KEF Uni-Q Driver
KEF Q50 Tower Speakers with Upgrade! Fantastic British UniQ Audiophile Sound! Seattle Pickup Only | Reverb
Look familiar? Read the original KEF uni q patent and it'll all make sense. The patent specifically covers the use of the woofer as a waveguide. NOT a coaxial/coincident array per se. :