The Klipsch KL-650-THX-L is a THX Ultra2 certified loudspeaker designed primarily for front left-channel reproduction in large home theaters. It can also be used for surround channels, however, and is equally suitable for combination home-theater/music systems demanding high output capability. Its enclosure is front-ported to facilitate installation in custom cabinetry, and has back-panel threaded inserts compatible with OmniMount 60.0 Series wall/ceiling brackets.

The KL-650-THX-L build includes a rectangular 90 x 60° Tractrix horn, designed to raise the efficiency of the speaker’s 1″ titanium-dome compression driver tweeter, and optimize its radiation pattern. The horn enables the speaker to meet THX Ultra2 directivity specifications without lobing and comb-filtering effects. And its dual 6.5″ woofers have magnetically-shielded motor structures that drive rigid, low-mass Cerametallic anodized-aluminum cones for high output and low distortion.