Nakamichi is a trademark of Nakajima Co., Ltd. in Japan. It is famous for its veteran, enthusiast and even master and expert in the audio industry. Coupled with today's network information, media reports, and even newspapers and magazines about audio fever in the past, it is occasionally said that "a CD box of Nakajima submarine is more than 30,000 yuan, which is not available to ordinary friends". At present, shops or enthusiasts who own this aircraft are even more favored.

Zhongdao is not only one of the four famous brand manufacturers of cassette recording stand in the world, but also developed the German High-Com II noise reduction system in cooperation with the former German Draegen Company in 1978. Because it can reduce noise by 20~25dB in the whole frequency band and has a good sense of hearing, it is still one of the top three civil noise reduction systems.

At present, the operator of Zhongdao Auto Audio in China is: Guangzhou Zhonghui Auto Supplies Co., Ltd.