Pa speaker series electro voice ekx principle active power 1 500 watt woofer size 12 inch design 2 way system speakers lf 1x 12 hf 1x dimensions 375 x 607 x 356 mm weight 188 kg noise level 132 db frequency responses 50 20000 10 db 60 18000 3 db hz dispersion 90 h x 60 v connections link thru types of connection rcacinch stereo xlr amplifier type class d crossover frequency 1700 hz