Active speaker pa monitor series behringer eurolive principle active power 250 watt woofer size 12 inch design 2 way system construction bi amping speakers hf 1x 3 lf 1x 12 dimensions 238 x 500 x 354 mm weight 107 kg noise level 121 db impedance 8 ohm frequency response 45 18000 hz connections microphone housing material wooden amplifier type class d crossover frequency 2000 hz energy consumption in watt 35 w