... 2.concert proessional speaker 3.hf,mf and lf speaker 4.600W/400W power speaker PA Speaker(CX-220)FEATURES:1.speaker sensitivity high2.grinds ... sand material3.MP3,CD,PC input4.KTV speaker 1.Multiple function with the special way of installation.2. ... 9001:2000,CCC and CE certification.Our products including amplifier,speaker,microphone and periphery audio goods.They are devided into two ...