BD 42 sound projectors are elegant and suitable for sound distribution in very large and noisy environments (e.g. railway stations, underground, car parks, factories, warehouses, shopping centres, etc). BD 42 sound projectors can be installed both indoor and outdoor (IP code, IP55). These have a cylindrical plastic body with an U bracket support for the installation and includes 2 dual cone loudspeakers (externally protected by grilles). Transformer for 100V constant voltage lines, with the possibility to set the power during the installation. A low impedance input (4ohms) is available.