Pa speaker principle active woofer size 15 inch design 2 way system speakers lf 1x 15 hf 1x 2 dimensions 416 x 678 x 454 mm weight 255 kg power rating rms 600 watts noise level 123 db frequency response 40 20000 hz sensitivity 98 dbmw types of connection xlr6 35mm trs combo rcacinch stereo xlr