With 5-inch 90 x 60 square Tractrix horn, the Klipsch RB-3 produces rich and powerful audio. The 400 watts peak power handling of this Klipsch bookshelf speaker delivers full-bodied sound. The 1-inch titanium dome tweeter of this Klipsch stereo speaker provides clean and natural highs. The Klipsch RB-3 speaker has medium density fiberboard construction (MDF) that makes it durable and tough. You get clear audio with maximum sound output with the 8 ohms impedance of this Klipsch bookshelf speaker. The 52 Hz-20 kHz frequency response of this Klipsch stereo speaker provides balanced and clear audio. The Klipsch RB-3 speaker has a 94 dB sensitivity that produces loud, theater-like audio.