Beilarly professional audio equipment goes to the world-Canada's Sudbury Rock Concert The system and dual 18-inch ultra-low speakers HP-218 & full-range listening box M4 are equipped with industrial amplifiers: FP10000Q, FP1800, P1500. The sound field of the entire sound system is not only evenly covered, but also the sound quality is clear, making the middle frequency round and full, the high frequency is delicate, and the low frequency dive is full of flexibility, ensuring that every corner of the performance site can enjoy a perfect music experience.