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The combination of convenience and performance that is a feature of the
entire custom installation range is no better demonstrated than by
the CCM663SR ceiling speaker. It marries a woven Aramid Fibre coned
twin voice-coil 150mm (6in) bass/midrange driver with an offset array of
two 25mm (1in) soft dome tweeters. Thanks to its highly accurate and
natural sound,Aramid Fibre features on their most advanced high
performance hi-fi speakers and it brings the same qualities to the
CCM663SR.The twin voice coils and tweeters combine the stereo
signal to enable the use of just one ceiling speaker in an installation zone
without the loss of one audio channel. The CCM663SR also includes a
two-position stereo/surround switch to instantly make the speaker very
suitable to be used as a surround channel.

Technical Specifications
Description                                 2-way dual channel in-ceiling system
Drive Units                                 2x Ø20mm (1 in) soft dome tweeter

                                                 1x Ø150mm (6 in) blue Aramid Fibre cone bass/midrange
Frequency range (-6dB)               48Hz – 30kHz
Amplifier Power                           25W – 80W(per channel)
Sensitivity SPL (2.83v. 1 m)         83dB (per channel)

                                                 89dB (both channels driven)
Nominal Impedance                     8Ω (4Ω) ( per channel)
Frame                                        240mm
Cut-out                                      202mm
Depth behind surface                  133mm
Protrusion                                  4mm
Pre-mount Kit                             C6
Back Box                                    6C