Professional sound box Type of this modelapplication to karaoke object, ballroom, other assistant+outdoor Frequency response 50hz-18khz(3db) Recommendatory input power 300w P.M.P.O 400w Sensitivity 97db(1-1m) Impedance 8 Speaker unit Low-15"-1 horn other Polar pattern 90ph-40pv Color ruby-red /black Amplifier at optionAk-180 N.W. 26 kgs / 57.3 lbs G.W. 29 kgs / 63.9 lbs L - w - h, box 16.1"-16.1"-25.6" / 410x410x650 mm L - w - h, package 18.5"-18.5"-28.0" / 470x470x710 mm