This 200mm (8") One-Shot Redback PA ceiling speaker has been engineered to be EWIS compatible and offer fast installation. A volume control in the middle of the grille allows for easy adjustment of local volume level. Ideal for installations where local volume needs to be higher or lower than the surrounding zone level. These speakers are ideal for BGM, paging & emergency warning applications. The offset transformer mounting allows mounting in ceilings with limited recess space. Fitted with twin cone 200mm driver with 4 way wire protect terminal block & 22uf bipolar cap.