Pa speaker principle passive woofer size 12 inch design 3 way system speakers lf 2x 12 mf 1x hf 1x dimensions 375 x 910 x 360 mm weight 203 kg power rating rms 500 watts power handling peak 1 000 watt impedance 8 ohm frequency response 30 18000 hz sensitivity 99 dbmw types of connection 6 35mm trs screw terminal speakon case material bass reflex