CCM663RD vs MartinLogan Helos 22
The Helos 22's sensitivity is 89 dB against the CCM663RD's 87.25 dB and its woofer 6.5" against 6". Both share impedance (8Ω) and ways (2).
AI-generated product photo — not official manufacturer imagery.
Estimated price (community-sourced)
Around — community and catalog average, updates slowly
The Bowers & Wilkins CCM663RD is a performance two-way in-ceiling speaker designed for installations where depth is limited. The 'RD' stands for Reduced Depth, achieved by a shallower cone and a redesigned QuickDogs frame, reducing the mounting depth to 92mm (3.6 inches) while maintaining excellent sound quality. It features a 150mm (6 inch) blue Aramid fiber cone bass/midrange driver delivering clean, detailed response, and a 25mm (1 inch) Nautilus swirl loaded aluminum dome tweeter that pivots for adjustable off-axis treble response. The speaker includes a three-position EQ switch to optimize sound for different installation environments. The supplied round grille is magnetic and paintable, with an optional square grille available. Recommended amplifier power is 25 to 100 watts, with a nominal impedance of 8 ohms and sensitivity around 86-88 dB. The speaker has a cut-out diameter of 202mm (8 inches), an overall frame diameter of 240mm (9.4 inches), and protrudes only 7mm (0.3 inches) from the ceiling surface. Compatible with PMK C6 pre-mount kit and BB6W or BB125C back boxes (sold separately). It is ideal for high-end in-ceiling music systems or home theater overhead channels. The product is currently listed at approximately and is no longer available directly from Bowers & Wilkins, indicating it may be discontinued or out of stock.
Driver and acoustic performance characteristics
Driver configuration and enclosure design
Size, weight, and appearance
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions
The closest alternatives on specs, description and the systems they turn up in, with the specs they share set side by side.
The Helos 22's sensitivity is 89 dB against the CCM663RD's 87.25 dB and its woofer 6.5" against 6". Both share impedance (8Ω) and ways (2).
The C583's sensitivity is 88 dB against the CCM663RD's 87.25 dB and its low-frequency extension 45 Hz against 35 Hz. Both share impedance (8Ω) and ways (2).
The PHANTOM K-60 LP's sensitivity is 84 dB against the CCM663RD's 87.25 dB. Both share impedance (8Ω), woofer (6"), and ways (2).
The 1000 ICW6's sensitivity is 89 dB against the CCM663RD's 87.25 dB and its woofer 6.5" against 6". Both share impedance (8Ω) and ways (2).
The specs and the pairings above are open to everyone. Sign up and you get the system builder, the assistant, a compatibility check against the gear you already own, and a watch on this product so a price or pairing change reaches you.
Sign up free