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Double 8 inch coaxial speaker box 2 frequency coaxial system using the ultra compact structure of birch, black steel surface by sand paint processing single point source system provides wavefront coherence with realistic bass cohesion, energy density, good transient can be able to put a sparkling, delicate and more penetrating precise frequency divider the design can optimize the power response and vocal performance if voice protection technology SonicGuard can effectively protect the high frequency driver, avoid power overload and interruptions