Tannoy CMS 603DC PI 6" Full-Range Dual-Concentric In-Ceiling Speaker


  • Brand: Tannoy
  • Product Code: CMS 603DC PI

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  • $249.00

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  • 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
  • Pre-install version supplied without back can (available separately)
  • 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.

CMS 3.0 CMS 603DC PI

The CMS 603DC PI 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 PI delivers wide and consistent broadband directivity with enhanced intelligibility – plus highly accurate and linear response.

Optimised for Installation

Specifically designed with a self-aligning 4 way clamp system for fast, simple and cost effective installation, CMS 603DC PI also features extra clamp extension to accommodate thicker ceiling panels, and a locking design that prevents over-tightening. A low-insertion loss 60 W transformer with convenient front panel tap switching, paintable powder coated steel mesh grille with dust protection, two tile support rails and one C-ring are all included. An Arco™ style grille, which conceals the entire unit for aesthetic purposes, back can, and plaster (mud) ring are available separately.


The CMS 603DC PI is finished in semi matt white and optimised for use with LAB GRUPPEN LUCIA amplifiers, which accommodate up to 8 CMS Series loudspeakers per channel.


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 amplifier power

160 W @ 16 Ohms

Nominal impedance (Lo, Z)

16 Ohms


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 fiber paper pulp cone

High frequency

25 mm (1.00") PEI dome





Zinc plated steel


Reflex 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

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

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")

Front of ceiling to

255.8 mm (10.07")

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)


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