The Tannoy CMS 603DC BM 6″ Full Range Ceiling Loudspeaker with Dual Concentric Driver – Blind Mount is a premium installation-grade ceiling speaker designed for commercial and residential audio systems where both performance and discreteness are essential. At its core is Tannoy’s advanced Dual Concentric driver — a 6.5″ full-range unit with an integrated 25 mm high-frequency dome that radiates sound from a single acoustic point, ensuring excellent phase coherence, precise imaging, and uniform dispersion across the listening area. This blind-mount design features an integrated backcan and installs entirely above ceiling tiles or drywall, leaving only a sleek, low-profile, paintable grille visible to preserve clean architectural aesthetics while delivering balanced, natural audio. The speaker offers wide frequency response, high sensitivity, and robust power handling, along with multiple transformer taps for flexible integration into 70 V, 100 V, or 16 Ω systems — making it suitable for background music, paging, voice reinforcement, and full-range sound reinforcement applications. Constructed with durable materials and UL-certified for general signaling and air-handling spaces, it combines Tannoy’s signature sonic clarity with practical installation features like magnetic grille attachment, corrosion-resistant construction, and secure spring-clip or screw-terminal connections. , the UL certified CMS 603DC BM delivers wide and consistent broadband directivity with enhanced intelligibility – plus highly accurate and linear response.
Features
- Full range ceiling loudspeaker for installation applications
- 80 Watts continuous, 320 Watts peak power
- Next generation 6″ Dual Concentric driver featuring Omnimagnet technology
- Torus Ogive waveguide for improved high frequency response and directivity
- Blind Mount version supplied with acoustically enhanced zinc plated steel back can
- Integrated single unit construction for ease of installation
- UL 1480 certified for general signalling systems
- UL 2043 certified for air-handling spaces
- Multiple transformer taps for 70 V and 100 V line systems or 16 Ohm direct input
- Low insertion loss 60 W line transformer with easily accessible tapping switch
- Optimised for Lab Gruppen low impedance LUCIA amplifiers with up to 8 CMS series loudspeakers per channel
- Semi matt white finish fits unobtrusively in any environment
- Powder coated UV resistant perforated steel mesh grille with dust protection
- Removable magnetic grille for custom painting
- Optional ARCO designer grilles available for minimal architectural impact
- Self-aligning 4 way clamp mounting system
- Mounting C-ring and ceiling tile rails included
Specifications
Performance
| Frequency response (-3 dB) (1) BM Backcan | 75 Hz – 30 kHz |
| Frequency range (-10 dB) (1) BM Backcan | 50 Hz – 30 kHz |
| Frequency range (-10 dB) (1) PI Backcan | 46 Hz – 30 kHz |
| System sensitivity (1 W @ 1 m) (2) | 91 dB (1 W = 4 V for 16 Ohms) |
| Nominal coverage angle | 90 degrees conical |
| Coverage angle (1 kHz to 6 kHz) | – |
| Directivity factor (Q) | – |
| Directivity index (DI) | – |
| Power handling (3) | |
| Average | 80 W |
| Programme | 160 W |
| Peak | 320 W |
| Recommended amplifi er power | 160 W @ 16 Ohms |
| Nominal impedance (Lo, Z) | 16 Ohms |
| Rated maximum SPL | |
| Average | 110 dB |
| Peak | 116 dB |
| Transformer taps (via front rotary switch) | |
| 70 V | 60 W (83 Ω) / 30 W (165 Ω) / 15 W (330 Ω) / 7.5 W (660 Ω) / OFF & low impedance operation |
| 100 V | 60 W (165 Ω) / 30 W (330 Ω) / 15 W (660 Ω) / OFF & low impedance operation |
| Crossover | – |
Transducers
| Dual concentric point source driver | 1 x 165 mm (6.5″) Dual Concentric driver, using Omnimagnet technology |
| Low frequency | 44 mm (1.75″) voice coil, treated multi fi ber paper pulp cone |
| High frequency | 25 mm (1.00″) PEI dome |
Physical
| Enclosure | |
| Backcan | Zinc plated steel |
| Baffle | Refl ex loaded UL 94V-0 rated ABS |
| Grille | Steel, with weather resistant coating |
| Safety features | Safety ring located at rear of enclosure for load bearing safety bond |
| CMS 603ICT LS | UL 1480 UUMW certifi cation for Life Safety applications |
| Clamping design | Security toggle clamp Min / Max clamping range 9.5 mm (0.37″) / 60 mm (2.36″) Recommended clamp torque: 1.5 Nm |
| Backcan options | |
| Blind mount (BM) | Complete with fi xed backcan |
| Pre install (PI) | Separate backcan for pre-installation |
| Cable entry options | Cable clamp & squeeze connector for conduit up to 22 mm |
| Conduit knockouts on PI Backcan | 3 Sets of horizontal positions 19 / 22 / 28 mm (0.75″ / 0.87″ / 1.10″) |
| Connectors | Removable locking connector with screw terminals with “loop through” facility |
| Compliance | UL-1480, UL-2043, CE |
Physical
| Dimensions | |
| Bezel diameter | 274.0 mm (10.79″) |
| BM model: Front of ceiling to rear of backcan | 255.8 mm (10.07″) |
| BM model: Front of ceiling to top of safety loop | 273.3 mm (10.76″) |
| PI model: Front of ceiling surface to rear of speaker unit | 100.7 mm (3.96″) |
| PI model: Front of accessory backcan bezel to top of safety loop | 168.5 mm (6.60″) |
| Hole cutout diameter (all models) | 253 mm (9.96″) |
| Net weight (ea) | |
| CMS 603DC BM | 6.6 kg (14.6 lbs) |
| CMS 603DC PI | 3.8 kg (8.37 lbs) |
| CMS 603ICT BM | – |
| CMS 603ICT PI | – |
| PI Backcan | 3.7 kg (8.1 lbs) |
| Included accessories | C-Ring, tile-bridge kit, paint mask, cut-out template, grille |
| Optional accessories | Plaster (mud) ring, Arco grille |
| Packed quantity | 2 |
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