The Promethean ASB-40 ActivSoundBar provides a powerful, high-quality sound option for most classrooms and meeting rooms. It can be used as the sole sound source for ActivBoards without built-in sound, or to enhance the depth and range of sound from units such as the ActivPanel Touch. Brackets are included to fix the ActivSoundBar to the top edge of selected Promethean ActivBoards or to a suitable surface. The ActivSoundBar provides 20W per channel stereo sound via multiple drivers. The unit can be connected to a source via RCA connectors or 3.5mm audio plug. A separate RCA socket enables output to be taken from the ActivSoundBar to a sub-woofer unit (not supplied).