The Tectonic PL-12 Flat Panel Loudspeaker is an ideal choice for medium to large spaces where very wide coverage, high output and extended duty - cycles are required. The PL-12 is a passive speaker system comprised of a pair of Distributed Mode Loudspeakers (DMLs) and a large format ribbon transducer / horn. The DMLs utilize resonant mode acoustic physics to propagate very wide, diffuse audio energy into a given space. The DMLs’ diffuse output has a frequency response of ~ 100Hz to ~16kHz with no cross-over network that can introduce phase and time alignment issues or possible distortion. The PL-12 DMLs have a horizontal and vertical coverage of 165⁰, are feed-back resistant and generate near-zero amounts of odd-order harmonic artifacts and distortion. The net effect is superior intelligibility throughout a venue.