The Dehong Electromechanical Music Festival combines passionate rock, cool locomotives, and national style electric music splashing water to form a different "temperature" of Dehong 2019. The enthusiasm and passion of the scene, through the transmission of professional audio systems, burned the souls of riders, audio fans and fans of Dehong City. They swayed ecstatically with the music, screamed and screamed for the roar of the locomotive, and pushed the music festival to the climax again and again. After 500 hours of uninterrupted flushing and splashing tests, Beilarly professional audio has stable performance and good sound quality. The use of a single 12-inch full-frequency line array speaker and dual 18-inch ultra-low speakers to form a sound reinforcement system with wide directivity, long projection distance, large sound pressure, and good hearing is the best choice for outdoor performances.