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Tannoy CMS601-BM Ceiling Monitor
Tannoy CMS601-BM Ceiling Monitor
Model No: CMS601-BM
Part No: 8001-4500
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The Tannoy CMS601-BM this 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 design comprises a 165mm (6.50") transducer mounted in a vented, injection moulded, paintable front baffle manufactured from UV/weather resistant UL94V-0 ABS material.

The point source configuration of the Tannoy ICT TM driver s mid-bass and tweeter sections ensures a wide and controlled dispersion for optimum coverage; this while avoiding the massive loss of energy in the vertical plane, at the crossover frequency, inherent in two-way discrete designs. The ICT (Inductive Coupling Technology) drive unit also addresses the two most common component failures experienced in background music and sound reinforcement systems, the tweeter and the crossover reliability. The use of a wireless electromagnetic tweeter means that no crossover is required in the design; this therefore ensures that an ICT TM unit is exceptionally reliable and therefore ideal for applications where constant heavy usage is the norm. This 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 that is induced with high frequency information generated by the low frequency voice coil, which is fed a full bandwidth signal. The mineral loaded polypropylene cone material and nitrile rubber surround further enhance durability and long-term reliability.

This compact unit is specifically designed for applications requiring the combination of premium sonic quality for music and speech reinforcement with  exceptional reliability.

The CMS 601BM is equipped with a low insertion loss 60W line transformer easily configurable to the following settings via front baffle mounted rotary tapping switch.
Applications [Open] [Close]
Commercial Audio
Pro Audio
Features [Open] [Close]
- 165mm (6.50") ICT TM transducer for greater durability and longevity.
- High power & high sensitivity with extended frequency response.
- Wide, controlled constant directivity dispertion for optimum coverage.
- Does not suffer from massive loss of energy in the vertical plane at crossover caused by two way discreet designs.
- UV/weather resistant UL94V-0 ABS front baffle.
- Blind Mount & Pre Install options .
- No crossover required.
- Easily accessible tapping switch on front baffle.
- Low insertion loss 60W line transformer.
- Packaged with tile rails and C-ring for quick & easy installation and simple stocking logistics.
- Five year warranty.
Details [Open] [Close]
Part Number8001-4500
Product TypeCeiling Monitor System
Frequency Response (-3dB) (1)78Hz - 22kHz Back can
Frequency Range (-10dB) (1)51Hz - 24kHz Back can
System Sensitivity (1W @1m) (2)91dB (1W = 2.45V for 6W)
Nominal Coverage Angle90 degrees conical
Coverage Angle (1kHz to 6kHz)92 degrees conical
Directivity Factor (Q)7.1 averaged 1kHz to 6kHz
Directivity Index (DI)7.9 averaged 1kHz to 6kHz
Rated Maximum SPL108dB (average), 112dB (peak)
Rated Maximum SPL : Peak112dB
Power HandlingSpecifications
Recommended Amplifier Power120W @ 6 Ohms
Nominal Impedance6 Ohms
Transformer Taps (via front rotary switch)Specifications
70V60W / 30W / 15W / 7.5W / OFF & Low Impedance operation
100V60W / 30W / 15W / 7.5W / OFF & Low Impedance operation
10% Full Power2nd Harmonic, 3rd Harmonic
250Hz1%, 0.14%
1kHz1.4%, 0.45%
10kHz1%, 0.1%
1% Full Power2nd Harmonic, 3rd Harmonic
250Hz0.32%, 0.14%
1kHz0.45%, 0.22%
10kHz0.32%, 0.1%
Crossover7kHz inductively coupled
Low Frequency1 x 165mm (6.50") mineral loaded polypropylene ICT™
High Frequency1 x ICT TM aluminium dome
Back canZinc plated steel
BaffleReflex loaded UL 94V-0 rated ABS
GrilleSteel, with weather resistant coating
Safety FeaturesSafety ring located at rear of enclosure for load bearing safety bond
Clamping DesignSecurity toggle clamp
Min / Max Clamping Range0.0mm (0.0") / 20.0mm (0.79")
Recommended Clamp Torque1.5Nm
Back Can OptionsSpecifications
Blind Mount (BM)Complete with fixed back can
Pre Install (PI)Separate back can for pre installation
Cable Entry OptionsCable clamp and squeeze connector for conduit up to 22mm
Conduit Knockouts3 Sets of horizontal positions 19 / 22 / 28mm (0.75" / 0.87" / 1.10")
ConnectorsRemovable locking connector with screw terminals with "loop through" facility
Safety Agency RatingsUL-1480, UL-2043, CE
Included AccessoriesC Ring, tile bridge, paint mask, cutout template, grille
Optional AccessoriesPlaster (Mud) Ring
BM Hole Cutout Diameter253mm (9.96")
PI Hole Cutout Diameter253mm (9.96")
Bezel diameter280mm (11.02")
Front of ceiling to rear of back can (BM)258mm (10.16")
Front of ceiling to top of safety loop (BM)275.5mm (10.84")
Net Weight (ea) : CMS 601BM14.33lbs, (6.50kg)
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