Klipsch KS7800THX each in-wall surround speaker Developed to bring a whole new dimension of reality to home theater, the Klipsch KS-7800-THX offers the ultimate surround sound performance in a flush-mount design. THX Ultra2 certification 8-inch aluminum woofer Two vertically-stacked Tractrix Horn-loaded tweeters Utilizes Klipsch's Wide Dispersion Surround Technology Because of its THX Ultra2 certification, the KS-7800-THX works well with movie presentations playing up to reference levels in rooms of 3,000 cubic feet or larger. The KS-7800-THX is also capable of delivering the same high-output, low distortion signature sound as its traditional enclosure counterpart, the KS-525-THX. It employs an 8-inch aluminum woofer and a patented horn array, consisting of two vertically-stacked Tractrix Horn-loaded tweeters. In order to create enveloping sound fields and precise localization of individual effects, this speaker also utilizes Klipsch's Wide Dispersion Surround Technology. Also referred to as WDST, this no-compromise approach gives the KS-7800-THX much more placement flexibility than conventional designs. Featuring an integrated back box enclosure, the KS-7800-THX's response is both predictable and repeatable. Because this enclosure fits easily within the loudspeaker's footprint, the KS-7800-THX can be installed into new or existing construction. Combine this dynamic loudspeaker with Klipsch's KL-7800-THX LCR speaker, KW-120-THX subwoofer and KA-1000-THX subwoofer amplifier to create a variety of THX Ultra2 in-wall system configurations. The KS-7800-THX can also be mixed and matched with the Klipsch THX Ultra2 traditional box products.