High-efficiency classic dumbbell design, 2-way 3-unit phase-inverted center. The center box is arranged in a dumbbell style, which can avoid the separation of sound and image caused by the scattered installation of multi-frequency #speaker units, so that the sound and image of each frequency band are unified, and the live sound image and natural sound are truly presented. The movie dialogue has a better texture. High and middle low frequencies are balanced, and the music is well-balanced.The 1.5-inch silk film tweeter is made of real silk, and the high frequency limit is good. High extensibility, the high frequency effect is clearer, and the vocal effect is more realistic. It can avoid the auditory fatigue in the long-term mixing process with natural and real sound effects.