Pa speaker principle passive power 280 watt woofer size 12 inch design 2 way system construction full range speakers lf 1x 10 hf 1x dimensions 370 x 590 x 290 mm weight 91 kg power rating rms 140 watts noise level 116 db impedance 8 ohm frequency response 50 20000 hz sensitivity 94 dbmw type of connection speakon case material bass reflex housing material plastic