ALL-IN-ONE 5.1ch SURROUND SOUND HOME THEATRE SYSTEM with Dts/AC-3/Dolby Prologic II decoder and SRS built-in . A :OUTPUT POWER Main center speaker power: 15Wx2(RMS) Center speaker power : 15Wx1(RMS) Surround speaker power :15Wx2(RMS) Subwoofer speaker output : 50W (RMS) Impedance (recommended) : 8ohm Damp coefficient : no less than 180 THD : no more than 1% (1KHz) B: Main channels: Main speaker frequency range : 200Hz~20KHz Center speaker frequency range : 200Hz~20KHz Surround speaker frequency range : 200Hz~20KHz Subwoofer frequency range : 200Hz~20KHz S/N rate : no less than 81dB Channel separated rate: no less than 40dB C: Power input: Impedance : no less than 10kohm Input sensitive rate : no less than 350mv Audio input: 2 x coaxial + 2 x optical + 1x2-channel D: SPEAKER UNIT: R/L1 : 3" (8ohm) * 1 CEN :2 "(4ohm) * 2 + 1"(8ohm) * 1 SR/SL : 2"(2ohm)* 4 SW :5.25"(4ohm)* 2 E: Dimension Product Dimension Size 1065mmx145mmx210mm Packing Dimension: 1135x285x210mm Cross weight :18 kg F: Loading 20' : 450SETS 40' : 900SETS 40'HQ : 1000SETS