The new Dual Concentric drive assembly features a treated mid-bass cone and double rolled cambric surround for high sensitivity, as well as a 1.34" (34mm) aluminium dome with ferrofluid cooled Neodymium magnet assembly and a newly designed waveguide for the high frequency unit. These two drivers merge into one with the high frequency mounted in the throat of the mid-bass; coincidentally aligning both transducers to a point source. The result is a smooth, uniform response over a very controlled 90 degree coverage area - even in the highest octaves.
The CMS 1201DC can be specified in distributed designs and located as efficiently as possible, minimising the number of devices typically required to cover a given area, reducing install time and cost. All Tannoy ceiling loudspeakers are simple to design into a wide variety of applications using Ease Address design software.
Each device comprises of three discrete components: the loudspeaker assembly (mounted on ported steel baffle), a separate 79 litre (2.8 cubic feet) steel back-can with multiple mounting points and a white powder-coated steel grille and moulded bevel cover.
The custom engineered powder coated steel back-can has been designed to cater for all conceivable installation possibilities making the CMS 1201DC versatile. Internally dampened with 11m OSB2 board, the addition of the back-can provides "exceptional low frequency performance on a par with conventional wooden enclosure loudspeakers - but from an in-ceiling format".
Steel mounting lugs allow for fitting to a Unistrut roof rail system in a variety of configurations both directly or via secondary prefixed cross struts. The device can also be hung via 4 top-mounted eye bolts, or as a further alternative, the design also caters for a single point central hang via M10 or 3/8 UNC screwed rod - made easy thanks to the slotted mounting saddle on the top of the back-can.
The CMS 1201 is available in both a standard low-impedance variant (CMS 1201DC) and a low insertion loss 60W line transformer-equipped version (CMS 1201DCt) for use on 70V or 100V distributed lines.
(Jim Evans)
