Power Amplifier, Professional Microphone, Audio Processor manufacturer / supplier in China, offering Sinbosen 10inch 12inhc 15inch Speaker 250W 350W 450W Professional Audio DJ Sound Equipment Amplifiers Speaker, Sinbosen Coaxial Speaker D300/D400s/S-118 12/15/18 Inch Speaker Subwoofer, Sinbosen Professional Ao-12b 12 Inch Active Subwoofer for Stage Outdoor Show and so on.