Pa speaker active speaker series behringer eurolive principle active power 1 000 watt woofer size 15 inch design 2 way system construction wireless speakers lf 1x 15 hf 1x dimensions 713 x 427 x 313 mm weight 177 kg frequency response 45 20000 hz connections bluetooth usb types of connection 6 35mm trs xlr usb crossover frequency 2200 hz