I recommend several good ones;
1. Guangzhou Yinhe Lighting and Audio Equipment Factory
Address: No.100 Self-made Beitai Road, Baiyun District, Guangzhou
2. Guangzhou Baiyun District Songzhou Ruidi Audio Equipment Firm
Address: No.36 Zengcha Road, Baiyun District, Guangzhou
3, hivi Sound
Address: No.13 Sansha Highway, Panyu District, Guangzhou