Boston Acoustics CR 400 Subwoofer

A great subwoofer that sounds and looks amazing. From the User's Manual: The CR400 subwoofer is designed to enhance the low-frequency output of stereo and home theater systems by extending the bass response of the system enabling the entire system to play louder and clearer. Boston Acoustics' engineers designed the CR400 to reproduce the deep fundamental tones of classical and rock music and to withstand punishment from special movie sound effects, such as explosions and punches. The CR400 can augment a conventional stereo system with a pair of full-range main speakers. Its built-in low-pass filter has been carefully optimized to integrate the subwoofer with full-range speakers, where the outputs overlap in frequency. A switch enables the correct matching of polarities between the subwoofer and the main speakers. The heart of the CR400 is a carefully optimized 8-inch (200mm) woofer in a cabinet with a rear vent. Both ends of the dual 2-inch (50mm) diameter vent are flared to reduce audible turbulence. The Boston-built long-throw woofer includes a high-rigidity, high-density copolymer cone and a reinforced steel frame. The driver employs our DCD (Deep Channel Design) technology, which relies on a deeply grooved pole plate that enables the voice coil to travel rarther than conventional signs permit. The increase in linear movement, known as "excursion, allows the driver to move an extremely large volume of air. The resulting bass response is deep and controlled. DCD also boasts exceptionally high power-handling and low distortion, which is evident in dynamic bass material. Always listen to speakers before buying.