Because compromise isn't an option, the Reference Series RB-61 lets listeners experience all the power, detail and emotion of cinematic spectacles and riveting concert performances. With its superior technology and elegant design, this speaker definitely stands out in a crowd. Exclusive Tractrix Horns have always been the key component of this critically acclaimed series. In the RB-61, this technology has been refined to include improved throat geometry for a more genuine, lifelike sound. Behind the horn lies a 1-inch titanium tweeter with a large ceramic motor structure to provide a unique combination of precision, clarity and effortless power. The RB-61 employs a 6.5-inch woofer for a solid bass foundation. This Cerametallic woofer with inverted copper dust cap exhibits a very high stiffness-to-mass ratio and superb damping characteristics.