Previous Limitations and Current Device Developments Since entering modern society, with the advancement of stage technology, the updated professional speaker equipment has been organically combined with sound amplification and transmission in the process of performing arts, and it has become one of the indispensable elements of performing arts. In major performing arts activities, professional speaker equipment and special sound effects, which undertake the role of sound transmission, have become one of the elements to ensure the success of performing arts. As a sound designer, you must first become a caring person.