Description： A-208, a vertical linear array compact two frequency division system, consists of two 65mm voice coils, 8-inch medium and low-frequency units and a 3-inch high-frequency compression driver installed on the dedicated horn with constant directivity. The low-frequency phase plate forms 120 ° radiation to concentrate energy and minimize the mutual interference between high and high tones. The sound is clear and fast, the music is soft and penetrating. There is an angle of 0 ° / 20 ° between the boxes, which can be easily stacked or hung according to different requirements of users. It is convenient to connect the system and reduce the installation time of the project.