1)p. M. P. O:125w 2)power supply:220v/50hz 3)s/n:55db 4)isolation(l, r): > 50db 5)safety test:3000v 1ma 1min 6)input sensitivity:300mv 7)rated power output(rm):50w+15w x 5 8)drive unit:6.5 +3 x 5 9)frequency response:40hz--140hz,140hz--20khz 10)impedance:80hm/40hm 11)size: Subwoofer: L285 x w260 x h285mm L105 x w90 x h420mm(front) L105 x w90 x h170mm(surround) L105 x w210 x h90mm(center) Qty/40\'\' fcl:728pcs Qty/40\'\' hq:857pcs