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RD stands for Reduced Depth – so this speaker will fit into tighter
spaces than the standard CCM663. A shallower cone and a redesign of
the easy-fit QuickDogsframe reduce depth to a more usable 92mm,
while retaining everything that makes the CCM663 such a great in-
ceiling speaker.
The familiar, yet discreet, dark blue Aramid Fibrecone of the bass/
midrange driver delivers a stunningly clean, detailed response. This,
combined with the pivoting aluminium dome tweeter for adjustable off-
axis treble response and three-position EQ, make this one of the most
versatile custom speakers around.
If preferred, the supplied round grille can be replaced with an optional,
square CCM663 grille.

Technical Specifications
Description                                 2 way in-ceiling system
Drive Units                                 1x Ø25mm (1 in) Nautilis swirl loaded aluminium dome tweeter
                                                 1x Ø150mm (6 in) blue Aramid Fibre cone bass/midrange
Frequency range (-6dB)               35Hz – 50kHz
Amplifier Power                           25W – 100W
Sensitivity SPL (2.83V, 1m)          86dB
Nominal Impedance                     8Ω (4.8Ω minimum)
Frame diameter                          240mm
Cut-out diameter                        202mm
Depth behind surface                  92mm
Protrusion                                  7mm
Pre-mount Kit                             C6
Back Box                                   BB6W or BB125C