EVAC 6 is a 10W metal ceiling loudspeaker with built in  6" (152 mm) coaxial speaker and 100V transformer, metal grill, steel fire dome. It is designed for installation in false ceilings or panels. EVAC 6 is equipped with a ceramic terminal mounted outside the body and a thermal fuse. The transformer power tap attenuator is located on the top of the housing, allowing adjustment of  desired power setting. The speaker is primarily intended for use in voice alarm systems, with additional capability for background music.