HS600-03 is a high-quality waterproof air raid alarm speaker with high power that can be changed according to demand, ranging from 240W to 800W. The air defense alarm horn speaker has a wide range of applications, with strong capabilities in preventing strong winds, hail, moisture, and corrosion. In addition, the alarm responds very quickly and its sound pressure is also high. It holds a place in civilian fields. In open areas, the coverage radius of the electro-acoustic siren can be up to one kilometer. In the city, due to the large number of tall buildings, the sound transmission is hindered, and the coverage radius of each siren is about 500 meters. The power of a single siren is small, but depending on a reasonable distribution and a sufficient number, the air defense siren can still sound throughout the city. In addition to the number, the points where the alarms are set are also important. After calculation, the height of about 30 meters, the effect of the alarm sound is the best. Some alarms are located on the roofs of 6 or 7-storey residential buildings. In addition to the anti-aircraft sirens, in recent years, a number of disaster-prevention sirens have been built in the prone areas of geological disasters. When natural disasters such as floods, mudslides, and forest fires occur, local disaster monitoring personnel can use these alarms to quickly and effectively organize timely transfer of personnel. High power siren speakers are your best choice for siren and voice announcement when dealing with outdoor warning for large areas. Our Aluminum high power horn speakers are popular world-while in high power siren and protective-signaling systems. Our high power horn speakers provide you Hifi voice and signal transmission.