Two-Way 100 mm (4" in) Co-axial Ceiling Loudspeaker.4" high output driver with polypropylene cone 19 mm (3/4 in) soft-dome liquid-cooled tweeter, 74 Hz – 20 kHz bandwidth, wide 120° coverage, 87 dB sensitivity. Combined 25 W multi-tap transformer at 70V/100V and 8ohm direct setting (30 W). White 2 adettir.