Case size: 
Primary:W180*D250*H180mm,
Vice:120*122*120mm; 
Control:volume, low tonge, switch;
speaker unit:5.25"30W*1*3.5"W*2;
input sensitivity:≥70db. 
S/N:430mV. 
Distortion:0.3%1W 1KHz. 
Frequency response:35Hz-18KHz. 
output power:30W*1+5W*2 
IC:2030*3+4558*1