Pa monitor pa speaker series jbl portable sound jbl pro jrx principle passive power 1 000 watt woofer size 12 inch design 2 way system speakers lf 1x 12 hf 1x 1 dimensions 584 x 399 x 325 mm weight 195 kg power rating rms 250 watts power handling programme 500 watt power handling peak 1 000 watt noise level 128 db impedance 8 ohm frequency responses 60 20000 10 db 80 18000 3 db hz sensitivity 98 dbmw dispersion 90 h