Theatre Speaker, Speaker 1.Output Power:20W 2.Impedance:4 ohm 3.Frequency: 40Hz-20KHz 4.Speaker unit:4"+3"*2 2.1 ... speaker, computer speaker, multimedia speaker, iphone speaker, USB speaker, MP3 speaker, mini speaker, speaker, home theatre ... box, speaker system, subwoofer speaker,karaoker speaker.2.1 Theatre Speaker Specification:Model No.:XC-8807. TDA2030*3 SubwooferSatelliteOutput power ...