1.Input:CD/PC/MP3,professional classroom audio solutions 2.Amplifier,receiver,loudspeaker 3.Power:2*50W,6.5inch active speaker 3 in 1 ... Active Loudpeaker,3 in 1 Bluetooth Active Speakers This ... -150W Treble :10Khz±12db,6.5"*1Bass:100Hz±12dB,3"*1S/N Ratio≥80dBPower SupplyAC 220V±10%/50HzChannel Space5MHzFrequency Response40Hz ...