Pa speaker series electro voice ekx principle active power 1 500 watt woofer size 15 inch design 2 way system dimensions 432 x 685 x 429 mm weight 232 kg power rating rms 400 watts noise level 134 db impedance 8 ohm frequency responses 48 20000 10 db 55 18000 3 db hz sensitivity 96 dbmw dispersion 90 h x 60 v connections link thru types of connection rcacinch stereo xlr crossover frequency 1700 hz