CMS50ICT & CMS50T ICT
USER MANUAL
HOLE CUT-OUT SIZE 210mm
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CONTENTS
1. Introduction
2. Unpacking
2.1 CMS50 ICT / CMS50T ICT The Product
The C-ring
The Tile Bridge and C-ring
The Plaster ‘Mud’ Ring
3. Installation Instructions
3.1 Hole Cut Out
3.2 Connections
3.3 Installation
3.4 Speaker Assembly with C-ring
3.5 Speaker Assembly with Tile Bridge and C-ring
4. Polarity Checking
5. Amplification and Power Selection (Low Impedance Mode)
6. Voltage and Power Selection (Distributed Line Operation)
7. Equalisation
8. Dimensions
9. Performance Data
10. Technical Specifications
11. CMS60 ICT Recommended Service Parts & Accessories
12. Warranty
13. Declaration of Conformity
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1. Introduction
Thank You for purchasing Tannoy CMS50 ICT Ceiling Monitor System.
The Tannoy CMS50 ICT Ceiling Monitor System is suited for high-level music and
speech reinforcement applications requiring exceptional sonic quality with
uncompromised reliability.
and existing buildings, this versatile design has addressed the two most common
failures of background music and sound reinforcement systems, which are firstly the
tweeter, and secondly the crossover. With the revolutionary design of the ICT™ drive
unit, neither of the above criteria applies, assuring you years of trouble free use.
ICT™ or Inductive Coupling Technology utilises a wireless electromagnetic tweeter
that does not require a crossover and cannot be burned out from heavy or abusive
use. The 1” aluminium high frequency dome has a deep drawn skirt that sits on the
inside of the low frequency voice coil in the same magnetic gap. The skirt is like a
single shorted turn, which is induced with high frequency information generated by
the low frequency voice coil, which is fed a full bandwidth signal. The ICT™ dome is
at the heart of our 5” ceiling transducer which utilises a moulded plastic cone and
nitryl rubber surround to further enhance it’s durability and long term reliability.
The ICT driver is housed in a rugged aluminium ceiling enclosure that has been
optimally tuned to achieve maximum bass response and tonal balance.
The CMS50T ICT houses a Tannoy THP 30 multi-tap transformer for distributed-line
operation. The transformer provides high system sensitivity, a wide bandwidth and
dynamic range, with very low insertion loss. For critical Applications provision has
been made for the CMS50T ICT to accept the THP 60, a 60W multi-tap transformer.
2. Unpacking
Every Tannoy CMS50 ICT and accessory is carefully inspected before packing. After
unpacking, please inspect your CMS50 ICT to make sure no damage has occurred in
transit. In the unlikely event of any damage, would you please notify your dealer
immediately and retain your shipping carton, as your dealer may ask you to return the
faulty unit to him for inspection.
The CMS50 ICT is packed in pairs, and any additional optional extras will be provided
in separate packaging. These options include: C Ring, Tile Bridge and Plaster Ring.
Achieving fast, simple and cost effective installation in new
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2.1. CMS50 ICT Product
C Ring (optional)
Wiring Cover
Speaker Grill
Back Can
Speaker Baffle
Tile Bridge and C Ring (optional)
Plaster Ring (optional)
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3. Installation Instructions
3.1. Cut-Out
The cut-out size required is 210mm.
3.2. Connections
The CMS50 ICT is provided with a plugable European type connector, which is
located on the back of the speaker can, under the wiring cover as shown in Figure 3a
below. This consists of a plug and socket. The plug can be removed from the socket
(Figure 3b) for wiring.
Figure 3a Figure 3b
To cable is inserted into the hole on the side of the plug, and the screw is tightened to
secure the cable in the plug. The plug is wired to the amplifier such that the
connections are as follows:
Pin 1 is Positive
Pin 2 is Negative
For additional speakers, pin 3 and 4
are in parallel with pins 1 and 2, where:
Pin 3 is Negative
Pin 4 is Positive
Before connecting the speaker, ensure the wiring cover and cable clamp on the back
of the can are open as shown in Figure 3c. Connect the wired plug into the socket.
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+ - - +
Figure 3c
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