Two-way ceiling loudspeaker (6.5'' + tweeter) with 10 W RMS power on 100 V line. Power selection 10, 6, 3 and 1.5 W. Complies with voice alarm regulations EN 54-24 and BS-5839, part 8. It incorporates a rear box for quick mounting by springs. Frequency response from 65 to 24,000 Hz. Sensitivity of 91 dB SPL at 1 kHz, 1 W and 1 m. Maximum acoustic pressure of 101 dB at 1 kHz and 1 m. White metallic finish, white RAL 9010 color. Dimensions Ø 220 x 134 (depth) mm. 194 mm Ø recessed hole.