Pa speaker series electro voice zlx principle passive woofer size 12 inch design 2 way system speakers lf 1x 12 hf 1x 15 dimensions 356 x 610 x 356 mm weight 149 kg power rating rms 250 watts power handling peak 1 000 watt noise level 125 db impedance 8 ohm frequency response 82 18000 hz sensitivity 92 dbmw types of connection xlr6 35mm trs combo xlr crossover frequency 2100 hz