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Chengde wedding service song and dance dui
Five hundred people, preferably six boxes. Second, listen. Two are nearby and two are far away.

Power amplifier, equalizer, effector, exciter. Blender. Microphones cost thousands of dollars or more. Generally speaking, power amplifier, mixer and equalizer can be used. The cheap ones are only 40,000-50,000. Better 654.38+ 10,000. No matter how good it is.

If you need more details, or buy equipment, I can introduce you to one who specializes in sound and will perform.