The Tannoy CMS 1201SW BACKCAN is a zinc-plated steel back can specifically designed for the pre-installation of the CMS 1201SW ceiling subwoofer. This acoustically enhanced enclosure is built for durability and performance, especially in newly constructed ceilings before drywall is hung. The internally damped 79-liter (2.8 cubic feet) capacity enhances the low-frequency performance of the subwoofer to be on par with traditional wooden enclosures. For quick and simple installation, it includes multiple fixing options and features Phoenix connectors for reliable input and link output.