Klipsch THX-8000-S 8" In-Wall Surround 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 an 8 inch aluminum woofer and a patent pending horn array, consisting of two vertically stacked Tractrix Horn loaded tweeters. WIDE DISPERSION SURROUND TECHNOLOGY (WDST) In order to create enveloping sound fields and precise localization of individual effects, this speaker