Hello Feile. Huizhou Yihengda Audio Accessories Co., Ltd. is a company specializing in the production and processing of speakers (horns), guitar amplifiers, speaker accessories, related musical instrument accessories and other products. It has a complete and scientific quality management system. Yihengda's speakers are technologically advanced, well-made, and the quality of the speakers is very good. However, its speakers are still slightly inferior to Feile. Shanghai Feile Audio Co., Ltd. was founded on November 18, 1984 and is the first joint-stock listed company in New China.