Zhejiang Trefan Audio Technology Co., Ltd. formerly known as Dongyang Audio Factory, was founded in 1985. It is a high-tech enterprise specialising in the research and development, manufacture and sales of loudspeakers, consumer electronics and audio engineering. The company is headquartered in Hengdian, Zhejiang Province. It established a loudspeaker and consumer electronics manufacturing base in Ruijin, Jiangxi Province in 2014, and a consumer electronics research and development centre in Shenzhen in 2015.

The company focusses on the research and development and production of acoustic products, constantly accumulates innovative technologies, introduces innovative talents, enhances industrial transformation capabilities, improves the standard management level, passes ISO9001, IATF16949 quality management system certification, and ISO14001 environmental management system certification, has stable customer resources, and has established long-term cooperation with many large and well-known enterprises across the country, and its products are exported to Europe, the United States, Japan, South Korea and so on.