5” acoustic diffuser for installation both semi-flush and wall-mounted. Metal container for fire protection suitable for 70/100V lines. 9W maximum power. 6W, 3W, 1.5W, 0.75 W @100V and 3W, 1.5W, 0.75 W, 0.375W @70V low-loss transformer. Frequency response: 300 Hz 15000 Hz. SPL (1W/1m): Sound pressure 91dB Dimensions: 170x170x63 mm Weight: 1.5 Kg. Colour: white RAL:9016. IP rating 21 Type A according to EN54 24.