speaker: subwoofer 8 inches sattlite box 3 inches out put the excess bass 18 Ws(Rms) satellite box 12W * 5 (Rms) output resistance: 4 OHM input sense: High fidelity input 500 importations, front, middle,back 350mvs, excess bass 50 mvs feactures size: principal main box D350*W200*H350(mm) the satellite box 73*H2930s(mm) ring speed: the bass high sound 20Hzs----150KHzs, SNR: 75db separation degree: 500db if anybody have interest,please contact me: