Tannoy CMS 603ICT LS 6" Full Range In-Ceiling Speaker with ICT Driver


  • Brand: Tannoy
  • Product Code: CMS 603ICT LS

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  • $319.00

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6" Full Range Ceiling Loudspeaker with ICT Driver for Life Safety Installation Applications (Blind Mount)

  • Full range ceiling loudspeaker for installation applications
  • 60 Watts continuous, 240 Watts peak power
  • 6" ICT (Inductive Coupling Technology) point source driver for extended frequency range
  • Blind Mount version supplied with acoustically enhanced zinc plated steel back can
  • Integrated single unit construction for ease of installation
  • High durability design for constant heavy usage in demanding applications
  • UL 1480 UUMW certified for life safety applications
  • 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
  • Optimized 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.


The CMS 603ICT LS is a wide bandwidth 240-Watt high sensitivity loudspeaker that utilises our third generation Ceiling Monitor System technology (CMS 3.0), and is UL certified for use with non-DC supervised systems. Thanks to an all-new proprietary 6" ICT (Inductive Coupling Technology) point source driver with extended frequency range, the CMS 603ICT LS delivers consistent broadband directivity with enhanced intelligibility. ICT drivers provide exceptional long-term reliability – and are ideal for constant-usage applications.

Optimized for Installation

Specifically designed with a self-aligning 4 way clamp system for fast, simple and cost effective installation, CMS 603ICT LS features an acoustically enhanced zinc plated steel back can with removable locking screw terminal connector and loop-thru functionality. 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, and plaster (mud) ring are available separately.


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


Frequency response (-3 dB) (1)

78 Hz - 22 kHz

Frequency range (-10 dB) (1)

51 Hz - 24 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)

92 degrees

Directivity Factor (Q)

7.1 averaged 1 kHz to 6 kHz

Directivity Index (DI)

7.9 averaged 1 kHz to 6 kHz

Power Handling (3)


60 W


120 W


240 W

Recommended Amplifier Power

120 W @ 16 Ohms

Nominal Impedance (Lo, Z)

16 Ohms

Rated maximum SPL


109 dB


115 dB

Transformer Taps (via front rotary switch)

70 V

60 W (83 O) / 30 W (165 O) /
15 W (330 O) / 7.5 W (660 O) /
OFF & low impedance operation

100 V

60 W (165 O) / 30 W (330 O) / 15 W (660 O) /
OFF & low impedance operation


7 kHz inductively coupled


Low Frequency

165 mm (6.50") mineral loaded polypropylene

High Frequency

ICT aluminium 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


UL 1480 UUMW certification 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

Complete with fixed backcan

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 rear of backcan

256.5 mm (10.10")

Front of ceiling to top of safety loop

273.8 mm (10.78")

Hole cutout diameter (all models)

253 mm (9.96")

Net Weight (ea)

PI Backcan

3.7 kg (8.1 lbs)

Included Accessories

C-Ring, tile-bridge kit, paint mask, cut-out template, grille