The JBL's CONTROL 24CT MICRO ceiling speaker system delivers robust, high-quality sound is excellent for medium-volume paging and background music applications such as restaurants, professional offices, and retail. Without access to the ceiling, installation is simple, and the built-in voltage transformer allows for extra speakers and system flexibility. To create a more versatile system capable of mixing and matching zones without separate equalisation, combine this public address system with other high/mid response control contractor systems. A Control Contractor subwoofer can be used to boost low frequencies.