Guangzhou CMX Audio Co., Ltd is the leading digital IP public address system, Digital EN54-16 Voice Evacuation System, IP network audio system and digital conference system manufacturer in China, we have one around 1,000 SQ meters factory well equipped with 2 SMT machine. Our factory are well quality-oriented ensure to make the highest reliable equipment for export business. The quality control system is strictly followed by ISO9001 and ISO14001.