Single 6. 5" Spun-copper woofer 1" Aluminum lets tweeter mated to a 90x90 square tractrix Horn 45Hz - 21kHz plus/minus 3dB Sensitivity 94dB at 2. 83V/1m 340 watts power handling The exclusive linear travel suspension (lets) minimizes distortion for enhanced, detailed performances. Kapton is an extremely light and rigid material used in the tweeter suspension to provide high efficiency and improve resolution and detail. Lets tweeters are a hallmark of Klipsch speakers, making it a core component of some of the best speakers in the world. Injection molded graphite (img) woofer cones are exceptionally light while being extremely rigid - providing remarkable low frequency response, with minimal cone breakup and distortion. When paired with the Tractrix horn-loaded lets tweeter, it provides speaker efficiency highest in its class. The rear Tractrix port is perfectly matched to the cabinet and woofers, creating ideal airflow with minimal distortion or turbulence even at the lowest frequencies. Tapered array crossovers improve dispersion resulting in improved midrange definition critical for dialog rich material in center channels. Exposed fasteners, angled feet and low profile magnetic grilles give the speakers a polished, modern appearance. Stylish aesthetic with absolute durability that results in a seamless integration into any decor. Reinforced MDF construction reduces cabinet vibration for less audible coloration and improved sonic accuracy.