The lecture hall of an institution in Beijing adopts the sound reinforcement system of Beilarly professional audio. Beilarly ’s engineers use the simple combination of 2 groups of 4 + 1 in the linear array Q10-Q12 according to the characteristics of the sound field of the report hall, and then take S-218 + Dual 18-inch subwoofers not only cover the sound field of the entire lecture hall uniformly, but also have clear sound quality, making the mid-range round and full, the high frequency is delicate, and the low-frequency dive is full of flexibility, ensuring that every corner of the lecture hall sounds The sound is thick and the tone is bright and prominent.