Heart-pounding bass. Stunning, clear sound from all directions. These are the hallmarks of today's high-tech movie sound experience. The subwoofer is the soul of great home theater sound, and Velodyne is the acknowledged leader in high-performance subs. Each Velodyne CHT Series powered subwoofer honestly delivers the authentic deep bass and high output needed for exciting movie sound effects. But, the CHT Series subs also deliver other essential Velodyne qualities of sonic accuracy and fidelity that are at the heart of music, whether reproducing a slappin' bass guitar or drum. Advanced Velodyne amplifier circuits prevent overdriving and damage so that you can really use a CHT Series sub, without abusing it. Plus, a full range of high-end features and controls means that a CHT Series subwoofer integrates seamlessly with your system electronics, no matter what name or combination of initials it has - Dolby Digital AC-3, DTS, THX or DSS. Subwoofer Direct input bypasses the CHT subs' internal crossover to provide direct connection to a preamp-level subwoofer or LFE output. This exclusive feature assures the highest levels of performance and compatibility with all digital surround processors, now and in the future. The fixed 85Hz high-pass crossover to the satellites assures the best possible sound from your smaller speakers by blocking signals below their optimum range. At the same time, the variable low-pass crossover allows perfect acoustic matching of a CHT sub to the satellites and "room-tuning" control. Continuously analyzing the drive signal, Velodyne's unique anti-clipping and over-excursion protection circuitry prevents poor sound and possible damage by keeping the subwoofer's output within safe operating limits. Video shielding prevents the CHT Series speakers from causing changes in picture quality on near-by TV monitors.