Pa subwoofer series dap audio mobile road principle active woofer size 12 inch design 1 way system speaker lf 1x 12 dimensions 370 x 530 x 480 mm weight 186 kg power rating rms 600 watts noise level 123 db frequency response 47 125 hz sensitivity 96 dbmw types of connection xlr6 35mm trs combo xlr housing material wooden crossover frequency 80 hz