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Tannoy - CMS 1201SW - 12" Ceiling Subwoofer (Single) is available to buy in increments of 1

Tannoy - CMS 1201SW - 12" Ceiling Subwoofer (Single)

Tannoy - CMS 1201SW - 12

Tannoy - CMS 1201SW - 12" Ceiling Subwoofer (Single)

12" Ceiling Subwoofer for Installation Applications

CMS 1201SW
The CMS 1201SW is a passive 1,600-Watt subwoofer and is ideally-suited for use with the CMS 3.0 range of ceiling monitor systems, or any full range system requiring extended bass response. Thanks to its powerful 12" long throw low frequency driver, the CMS 1201SW delivers dynamic LF extension and premium grade audio for installed music and speech reinforcement applications.

Low Frequency Driver
Intended for systems utilising an external active crossover and separate amplifier channels for the subwoofers, CMS 1201SW’s 12" (300 mm) bass driver features a 3" copper sandwich voice coil for low power compression, and triple aluminium demodulating rings for ultra-low distortion.

Optimised for Installation
The custom-engineered powder coated steel back-can and grille assembly (both available separately) have been designed to cater to all conceivable installation possibilities, making the CMS 1201SW extremely versatile. The internally-damped 79 litre (2.8 cubic feet) back-can provides exceptional LF performance that is easily on par with conventional wooden enclosure loudspeakers. Steel mounting lugs allow for fitting to a Unistrut roof rail system or for suspension via 4 top-mounted eye bolts. Alternatively, the design allows for a single point suspension, which can be handled via the use of M10 or 3/8" UNC screwed rod. Connection is quick and simple using terminal barrier strips inside the can, which are easily accessed via 20 and 29 mm conduit knockouts on all 5 sides. Installation can be facilitated by a single person, which can amount to considerable savings in large-scale projects.

The CMS 1201SW is optimized to work in conjunction with LAB GRUPPEN amplification.


  • High power ceiling subwoofer for installation applications
  • 400 Watts continuous, 1,600 Watts peak power
  • 12” driver with long throw copper voice coil for low power compression
  • Provides low frequency reinforcement for class-leading TANNOY CMS 3.0 range
  • For use with CMS 1201SW back can and CMS 1201 grille assembly (available separately)
  • Back can fixings allow multiple installation options
  • Time-saving design enables one person speaker installation
  • Designed and engineered in the U.K.


Frequency response (-3 dB)
34 Hz - 1 kHz

Frequency range (-10 dB)
30 Hz - 3 kHz

System Sensitivity (1W @1m)
93 dB (1 W = 2.83 V for 8 Ohms)

Rated maximum SPL
120 dB

126 dB

Power Handling
400 W

800 W

1600 W

Recommended Amplifier Power
800 W @ 8 Ohms

Nominal Impedance
8 Ohms

1 x 300 mm (12") Bass Driver with 3" Voice Coil

1.6 mm black powder coated steel, damped with particle board

1.2 mm black powder coated steel

1.0 mm white powder coated perforated steel

Terminal barrier strip inside the can, with loop thru capability

Safety Features
Safety ring located at the rear of enclosure for load bearing safety bond

Cable Entry Options
20 mm and 28 mm on knockouts

Conduit Knockouts
4 sides + top

Dimensions (H x W x D)
331 x 725 x 516 mm (13.0 x 28.5 x 20.3")
including optional backcan

Net Weight
21.8 kg (48.0 lbs)

6.9 kg (15.2 lbs)

1.0 kg (2.2 lbs)

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