Combo system series behringer europort principle active power 40 watt woofer size 8 inch design 2 way system construction wireless speakers hf 1x 1 lf 1x 8 dimensions h x b x t 420 x 309 x 242 mm weight 82 kg frequency response 45 18000 hz connections bluetooth microphoneinstrument type of connection rcacinch stereo operating time 12 h