The Polk Audio MXT20 is a compact, wall-mountable bookshelf speaker designed for high-resolution sound for music, movies, and gaming. It features a 6.5-inch bi-laminate paper cone woofer and a 1-inch Terylene dome tweeter, delivering a frequency response from 38 Hz to 40kHz. The speakers are Hi-Res Audio and Dolby Atmos certified, compatible with DTS:X, and built with low-resonance MDF cabinets for clear audio.