A 3-way full range loudspeaker in a vented trapezoidal enclosure. Includes a 12-in woofer, a horn-loaded 7-in midrange cone with Radial Phase Plug™, and a 1.4-in exit compression driver on a 90° x 45° constant directivity horn. The internal crossover is user-switchable for either passive or bi-amp operation (with a passive LF/MF crossover).