Speaker, Audio manufacturer / supplier in China, offering Compact Size Powerful Aluminum Alloy Durable 150W 8 Ohm Column Speaker for Lecture Hall/ Church/ Conference Room, Professional 120-Channel Dante Network Digital Mixer with 32 Mic/Line Inputs, Home Theater & Karaoke System Dual 8 Inch 550W Active Subwoofer with Built-in DSP and so on.