Beijing 797 Huayin Electronics Co., Ltd. (formerly known as State-owned Factory 797) is a professional manufacturer of electro-acoustic devices. Founded in 1954, it is the chairman of the National Electroacoustic Device Industry Association and the unit of the secretariat. It has a long production history, strong technical force, sophisticated production equipment, and scientific testing methods. We have good cooperation with the Institute of Acoustics of the Chinese Academy of Sciences and the Institute of Television and Electroacoustics of the Ministry of Information Industry. We have the largest anechoic chamber in Asia and a complete set of Danish B&K electroacoustic test systems.

Our products include three major parts: One is the speakers for color TVs and radio cassette tape recorders. The caliber is from Φ40 to Φ166, there are hundreds of varieties, and the production capacity is 10 million pieces per year. The second is the speakers for car audio. There are currently 39 varieties and the production capacity is 1.2 million pairs/year. The third is audio and engineering speakers. There are currently dozens of varieties, with a production capacity of 3.2 million pieces per year. The color TV supporting speakers have been supporting the Chinese and overseas factories of international famous companies such as Haier, Mitsubishi, Panasonic, NEC, and Hitachi. The car speakers are sold well in the car audio market in Brazil, the United States, and Germany.

We successively undertook the sound reinforcement system projects for Zhongnanhai, the Great Hall of the People, the main venue of the World Women's Conference, and the main stadiums of the Asian Games. On the eve of the 50th anniversary of the founding of the People’s Republic of China, the sound broadcasting and sound reinforcement system of the new terminal building of Tiananmen Square, Beijing Railway Station and Capital Airport was completed.

The company started to use two SRC-120SA (flow 16m³/min, pressure 0.8MPa, voltage 380V) air compressors from Shanghai Schneider Sunshine in 2013, which are mainly used for the production and cleaning of circuit board workshops.