Speaker unit:0.75″ 4″1,0.75″ 4″2, 0.75″ 4″3, 0.75″ 4″4 With clear sound and wider frequency response Bell-shaped cavity structure increases column strength and reduces enclosure resonance Waterproof design, aluminum surface mesh, enclosure material made of weather-resistant engineering plastic ASA, long-term use without discoloration, no aging Novel and stylish appearance, making the environment more modern
