Key Specifications/Special Features: ?Output power: 30W + 10W x 5 ?P.M.P.O.: > = 5000W ?Frequency response : 45Hz-20kHz ?S/N: > = 65dB ?THD < = 0.5% ?Subwoofer : 6 ohm ; 5.25" ?Center : 4 ohm ; 3" x 2 ?Front Surround : 4 ohm ; (3"+1.5") x 2 ?Rear Surround : 4 ohm ; 3" x 2 ?Power supply: AC220V/50Hz-60Hz ?Net weight: Kg ?Packing size: 426 x 365 x 416mm