Rated Input Selection / Impedance 670 (15W), 1k (10W), 2k (5W), 3.3k (3W) Sound Pressure Level 110dB (1W, 1m at 500Hz to 2.5kHz peak level) Frequency Response 280Hz 12.5kHz Polarity Hot : Black Com : White Operating Temperature -20o to +55o C (must be free from dew condensation) Finish Horn flare: Alumunium, Off white Reflector horn and rear cover: ABS resin, off-white bracket Screws and bolts: steel Speaker cable : Polyvinyl chloride insulated cabtyre cable ( 6mm in diameter, 400 mm in length ) Dimensions Diameter 196 (W) x 240 (D)mm Weight 1.1 kg