Tannoy CMS-403DC-E

CMS 403DCe 4" Ceiling Speaker with 70/100V Transformer and Low Impedance Operation

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The Tannoy CMS 403DCe is a full bandwidth, high power-handling and high sensitivity loudspeaker built around CMS 3.0 – the third generation of Tannoy’s revolutionary Ceiling Monitor System technology. Based on an all-new evolution of Tannoy’s proprietary Dual Concentric point-source driver, the CMS 403DCe has been fundamentally re-engineered to deliver wider and more consistent broadband directivity, even greater intelligibility, and a more accurate and linear response.

The new Dual Concentric driver design features revolutionary Omnimagnet technology and unique patent-pending Torus Ogive Waveguide device, together providing more consistent and controlled directivity along with improved high frequency response. Improved time-alignment and greater coherence between LF and HF results in a wider sweet spot for enhanced performance both on- and off-axis. The re-designed baffle provides a subtle extension to the waveguide effect for additional sonic benefits.

The CMS 403DCe also features extra clamp extension to accommodate thicker ceiling panels, and a locking design that prevents inadvertent over-screwing. Specifically designed for fast, simple and cost effective installation in new and existing buildings, the CMS 403DCe can be entirely angled towards the listener within the fixed ceiling-mounting ring. By discreetly pivoting the loudspeaker towards the desired area of coverage, the problems of difficult speaker placement - particularly in less than perfect room configurations – are easily overcome.

The CMS 403DCe utilizes a 16 ohm driver, making it ideal for use in high performance low impedance systems (with optimized performance when used in conjunction with Lab.gruppen LUCIA amplifiers). A low-insertion loss 30W transformer is included, with convenient front switching for taps at 30 W, 15 W and 7.5 W, with an additional 3.75 W tap for traditional constant voltage systems.

The CMS 403DCe is supplied with an integral back-can, ready to install as a single unit. The removable locking connector has screw terminals for secure wire termination and loop-thru facility. Strain relief is provided by a clamping mechanism for use with plenum-rated cable or conduit, while the new design’s spring-loaded and self-aligning clamps make for even quicker and easier installation. All models are supplied with two tile support rails and one C-ring; a plaster (mud) ring is available as an optional accessory.

Tannoy CMS 403DCe Features:

  • Advanced new Dual Concentric driver design utilizing Omnimagnet technology
  • Torus Ogive Waveguide device for improved broadband directivity
  • Tight, uniform 70° dispersion pattern forhigh-ceiling applications
  • Improved time alignment and phase coherence, delivering even better sonic performance
  • High power and high sensitivity with extended frequency response and very low distortion
  • Improved LF performance for applications where genuine bottom-end is a must
  • Low insertion-loss, 30 watt line transformer for a more powerful and dynamic performance
  • Convenient front-tapping switch for settings
  • Magnetically-adhering grille system for easy custom painting and optional Arco designer grilles for minimal architectural impact
  • Three-clamp, self-aligning mounting system
  • UV/weather resistant UL94V-0 ABS construction for structural integrity
  • Packaged with classic grille, tile rails and C-ringfor quick and easy installation and simple stocking logistics
  • Five year warranty

Tannoy CMS 403DCe Specifications:

  • Frequency Response (-3 dB): 110 Hz - 50 kHz
  • Frequency Range (-10 dB): 80 Hz - 54 kHz
  • System Sensitivity (1 W @ 1 m): 88 dB (1 W = 4V for 16 Ohms)
  • Nominal Coverage Angle: 90° conical
  • Power Handling: Average 60 W, Program 120 W,Peak 240 W
  • Recommended Amplifier Power: 120 W @ 16 ohms
  • Nominal Impedance (Lo, Z): 16 Ohms
  • Rated Maximum SPL: Average 106 dB, Peak 112 dB
  • Transformer Taps (via front rotary switch):
    • 70V: 30 W (165 Ohms) / 15 W (330 Ohms) / 7.5 W (660 Ohms) / 3.75 W (1320 Ohms) / OFF & low impedance operation
    • 100V: 30 W (330 Ohms) / 15 W (660 Ohms) / 7.5 W (1320 Ohms) / OFF & low impedance operation


For full specifications on this product,refer to the attached Data Sheet under the Documentation Tab

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