The rectangular high-power horn speaker is a set of ultra-high-power long-range emergency broadcast speakers. It is made with high-efficiency rare-earth neodymium-iron-boron magnet materials, featuring high electro-acoustic conversion efficiency, high power, and low heat generation. A single horn can transmit up to 1.5KM, and when arranged in a linear array, the transmission distance can reach 2.5 to 3KM. This horn can be widely used in highways, border defense, military, civil air defense, emergencies, and sudden disaster situations;
