Description : Rated Input : 6W, (100V line) / 3W (70V line) Rated Impedance : 100V line; 1.7k Ω (6W), 3.3k Ω (3W), 6.7k Ω (1.5W), 13k Ω (0.8W) / 70V line; 1.7k Ω (3W), 3.3k Ω (1.5W), 6.7k Ω (0.8W), 13k Ω (0.4W Frequency Response : 100 ~ 16,000Hz Speaker Component : 12cm dynamic cone type speaker Dimensions for Fixing Hole : Mounting hole; ø150mm / Ceiling thickness; Max. 50mm Speaker Mounting Method : Spring catch Applicable Cables : 600V vinyl insulated cable (1V wire or HIV wire) / Solid copper wire; ø0.8 ~ ø1.2mm / 7 core twisted copper wire; 0.75 ~ 1.25mm2 Connection : Push in connector (bridging terminal 2 branch type). Sound Pressure Level : 90dB / W / M, 330 ~ 3,300Hz, pink noise Dimensions : ø180 x 11 (exposed section) + 110mm Weight : 655g (bracket excluded Finish : ABS resin, Off-white.