Pa speaker principle passive power 350 watt woofer size 15 inch design 2 way system construction full range speakers lf 1x 15 hf 1x dimensions 445x700x360 mm weight 138 kg power rating rms 180 watts noise level 119 db impedance 8 ohm frequency response 45 20000 hz sensitivity 96 dbmw type of connection speakon case material bass reflex housing material plastic