Active speaker pa speaker pa sound system principle active power 1 200 watt woofer size 12 inch design 2 way system speakers lf 1x 12 hf 1x dimensions 300 x 385 x 670 mm weight 22 kg power handling peak 800 watt noise level 128 db impedance 8 ohm frequency response 30 20000 hz connections sd card microphone usb types of connection rcacinch stereo clamp contacts usb case material bass reflex