Active speaker pa speaker pa monitor series behringer eurolive principle active power 300 watt woofer size 8 inch design 2 way system speakers lf 1x 8 hf 1x 135 dimensions 372 x 249 x 205 mm weight 666 kg noise level 113 db connections microphoneline line types of connection 6 35mm trs xlr case material bass reflex amplifier type class d