Although the speakers are semi-active and require an active crossover, all power amplification must be separately sourced. Each CT8 LR, CT8 CC and CT8 DS requires two channels of power amplification, or three if used with a CT8 SW subwoofer. This allows the user maximum flexibility in choosing these components.
The CT8 SW subwoofer, unlike the majority of subwoofers currently available, does not contain its own power amplifier and is used in a different manner than is usual. The original concept of home theatre based on various Dolby Digital and DTS systems advocates five or more main channels plus a single Low Frequency Effects (LFE) channel. The main channels contain full range signals and the LFE channel contains special effects up to approximately 140Hz. Recognising that many people do not want five or more
To preserve this directional information, a CT8 SW may be added to each of the main channels as desired, extending the frequency response well below 20Hz. The minimum recommended configuration is to assign one subwoofer to each of the front left and right channels, restoring some directional information to the action directly on the screen and full directional information to
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