Active speaker pa subwoofer series electro voice zxzxa principle active power 800 watt woofer size 12 inch design 1 way system speaker lf 1x 12 dimensions 400 x 444 x 457 mm weight 209 kg power rating rms 700 watts power handling programme 700 watt noise level 126 db frequency response 53 93 hz crossover frequency 100 hz