What is metal horn?

Metal horn is a type of loudspeaker driver used in audio systems. It is made of metal and consists of a cone-shaped diaphragm connected to a voice coil. When an electrical current is applied to the voice coil, it moves back and forth, causing the diaphragm to vibrate and produce sound waves. Metal horns are known for their high efficiency, which means they can produce a lot of sound with relatively little power. They are often used for live sound reinforcement in large venues such as stadiums and concert halls. However, metal horns can also produce harsh or sibilant sounds at high frequencies, so they may not be ideal for all types of music or audio applications.