Two-way ceiling speaker (6.5" woofer + tweeter) with rear enclosure and power rating of 30 W (selectable to 3', 17, 7.7 & 3.75 W), 100 V line. Available 8 ohms connection. Complies with voice alarm norms, BS-5839 part. 8 and EN 54-24. Frequency response of 100-19,300 Hz. Sensitivity 89.8 dB (1 W, 1 m and 1 kHz). Maximum sound pressure level 104.6 dB (30 W, 1 m and 1 kHz). Ceiling quick fit mounting. Dimensions 239.5 mm (Ø) x 141 mm (depth), ceiling mounting hole 208 mm Ø. ABS & metallic grid, white colour (RAL 9016).