Tannoy CMS 603DC BM 6" Full Range Ceiling Loudspeaker with Dual Concentric Driver (Blind-Mount,Pair) - TA-CMS603DC-BM

Tannoy SKU: TA-CMS603DC-BM
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Sale price$758.00


(Sold as a pair)

The CMS 603DC BM is a full bandwidth 320-Watt high sensitivity loudspeaker that utilises our third generation Ceiling Monitor System technology (CMS 3.0). Thanks to an all-new proprietary 6" Dual Concentric point-source driver with Omnimagnet technology on a Torus Ogive Waveguide, the UL certified CMS 603DC BM delivers wide and consistent broadband directivity with enhanced intelligibility – plus highly accurate and linear response.


  • 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

  • 10-Year Warranty Program*

  • Designed and engineered in the U.K.

Data Sheet


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)

80 W


160 W


320 W

Recommended amplifi er power

160 W @ 16 Ohms

Nominal impedance (Lo, Z)

16 Ohms

Rated maximum SPL

110 dB


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



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


Zinc plated steel


Refl ex loaded UL 94V-0 rated ABS


Steel, with weather resistant coating

Safety features

Safety ring located at rear of enclosure for load bearing safety bond


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")


Removable locking connector
with screw terminals with
“loop through” facility


UL-1480, UL-2043, CE

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)

6.6 kg (14.6 lbs)


3.8 kg (8.37 lbs)





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


At Creartion Networks, we do everything we can to create an excellent customer experience. This includes fast shipping and easy returns.

  • Most in-stock orders placed Monday-Friday before 1PM PST ship the same day. Orders placed after 1PM will ship the next day of business. General restrictions apply; please see our full shipping policy here.
  • We offer a 30-day return policy from the delivery date on many products. Product restrictions apply. Restocking fees for the return of open-box items. Please see our full return policy here for more information.

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