Changchun Haizhilian Water Park is one of the largest indoor water parks in Northeast China. After careful selection of professional equipment audio, Beilarly professional audio equipment was finally selected. Beilarly audio engineers used Q10B line array with STX-815M back listening and other products according to the water park architectural characteristics and sound requirements. The sound field of the whole water park is evenly covered, and the sound quality is clear, making the middle frequency round and full, the high frequency is delicate, the low frequency dive is flexible, and the real sound is thick and bright.