The DLA-210 line array system is a mid-to-large, cost-effective, high-schedule line array loudspeaker system. The neodymium magnetic treble is used, the treble is transparent, with 75 treble, the sound pressure is greatly attenuated and reduced, the transmission distance is long, the middle frequency is thick and the crossover point is about 2.2K, and the treble and bass have a good combination point. Subwoofers combine all the advantages of a bass inverted system and a horn speaker: high efficiency, long range, low lower frequency, coupling of the sound field through the entire front plane, so that normal air friction distortion and point loss of distortion are minimized, energy is efficiently transmitted while generating controllable pulses, and optimal dynamics are obtained;