Pa speaker principle passive power 1 000 watt woofer size 15 inch design 3 way system construction full range speakers hf 1x mf 1x 8 lf 1x 15 dimensions 755 x 490 x 370 mm weight 18 kg power rating rms 500 watts power handling programme 1 000 watt noise level 97 db impedance 8 ohm frequency response 30 18000 hz sensitivity 97 dbmw housing material wooden