Founded in 1970, Gentleman has been focusing on the development of home audio in the early days, and has now been acquired by Hong Kong East Asia Technology, but the product development and production are still carried out in the original factory in Denmark. In the history of Gentleman's Box, there have been a number of products that people talk about, the most classic of which is the low-mid and bass monomer that players jokingly call the "watermelon skin" diaphragm, and the amazing performance in the Alpine car package is still remembered more than ten years later. In 2010, the gentleman's beryllium diaphragm was successfully developed, making it one of the few manufacturers in the world with beryllium treble production technology except Jinlang and Yasser, the treble is extremely transparent and pure, but the price is also relatively expensive, and a single 55mm unit also needs 2500 yuan / piece. Although Gentleman has opened its first flagship store in Guangzhou, its domestic agents only cover individual provinces and cities such as Shanghai, Shandong, and Heilongjiang.