When it comes to hifi sound, European and American technology has always been in the forefront of the world. Among them, Britain is one of the first countries to study hifi technology. Almost every brand has its own characteristics. In order to have better sound effect, they have devoted almost all financial and material resources to research and development at no cost. That's why, It has laid a very solid foundation for hifi sound, which not only enriched the sound technology, but also provided new ideas for later development, so that hifi sound can continue to flourish. What are the specific core technologies? Here we are.