The Tannoy CMS 1201SW BACKCAN is a specialized back can enclosure designed to complete the installation of the Tannoy CMS 1201SW ceiling-mounted subwoofer. This accessory is an integral component for achieving optimal acoustic performance and installation integrity when deploying a subwoofer in a ceiling cavity. The back can serves as a rigid, sealed enclosure that provides the necessary air volume and structural support for the subwoofer driver, isolating it from the often irregular and acoustically lossy space above the ceiling. By creating a defined, controlled environment for the driver, the back can ensures that the subwoofer performs to its specified frequency response and output capabilities, delivering tight, accurate bass that is free from unwanted resonances or cancellations caused by an infinite baffle or undersized cavity.

Constructed from durable, acoustically inert materials, the back can is engineered to fit precisely with the CMS 1201SW subwoofer chassis, forming a complete loudspeaker system. Its design includes provisions for secure mounting to the building structure and sealed cable entry points to maintain the integrity of the enclosure. The use of a dedicated back can is particularly important in commercial installations where ceiling plenums may be used for HVAC, lighting, and other services, as it prevents sound waves from escaping into these spaces and protects the driver from dust and debris. This results in more efficient bass reproduction, improved sound quality, and greater reliability over the life of the installation.

For audio system designers and installers using the Tannoy CMS 1201SW subwoofer, the BACKCAN is an essential accessory that unlocks the full potential of the low-frequency system. It transforms a ceiling cavity mount into a properly engineered subwoofer enclosure, ensuring consistent performance that aligns with the system design intent. By providing a controlled acoustic environment, the back can allows the subwoofer to integrate seamlessly with full-range ceiling speakers, creating a cohesive and powerful full-range audio experience in theaters, worship spaces, high-end retail, and other premium installed audio applications.