Klipsch THX-8000-L 8" In-Wall Speaker, EachTHX ULTRA CERTIFIED Works well with multi channel movie and music presentations playing up to reference levels in rooms of 3,000 cubic feet or larger. CINEMA QUALITY SOUND Employs high output aluminum woofers for powerful bass impact, while a 1 inch titanium tweeter mated to symmetrical pattern 80 x 80 Tractrix Horn generates flat in room frequency response with high efficiency and low distortion. MAXIMUM INSTALLATION RELIABILITY This in wall speaker