NP acoustic established in 2016 in Hanoi, Vietnam is the first professional manufacturer of Hi-end audio productsin Vietnam. Before NP acouticappeared, Vietnamese music lovers mainly used imported products, however, not everyone could afford to own qualified music products because it is extremely expensive compared with the income of most people. The first product of NP acoustic is a sound transformer. This is anoutstanding product and also an achievement after nearly 20 years of research and development.