The CMS 1201DC features Tannoy's proprietary 12-inch Dual Concentric point-source driver, where the high-frequency (HF) transducer is mounted behind the center of the low-frequency (LF) driver. This unique configuration delivers a consistent 90° conical dispersion with perfect phase coherence and a smooth, linear response, ensuring enhanced intelligibility for both music and speech. The speaker is built to handle significant power, with a peak rating of 800 watts, making it suitable for large spaces with high ceilings like ballrooms, airports, shopping malls, and conference centers.

The robust design includes a treated LF cone and a 1.34-inch aluminum HF dome with a neodymium magnet system. The separate back-can, sold separately, is engineered from powder-coated steel and internally damped for superior low-frequency performance that rivals conventional wooden enclosures. The entire system is optimized for quick and easy installation, even by a single person, saving considerable time and cost on large projects.