professional speaker,stage speaker, high quality and low price. good sound effective. Channels: active stage speaker Product name:2.0-Channel SpeakerProduct model:2.0-Channel SpeakerProfessional soundProfessional soundPower:550WRated Impedence:4Ohms-8OhmsSNR:more than 89 dBSizes of Speakers: 3x3"+12"Frequency Response:40Hz-18KHzPacking Size:440(L)×390(W)×725(H)mmLoading Quantity:20′(28m3):225sets 40′(58m3):466sets 40′HQ(68m3):546setsets

2.0 active professional usb sd fm subwoofer led dj sound speaker box