High-gain refers to a characteristic of antennas, amplifiers, or other devices that significantly increase the strength of a signal. In the context of antennas, high-gain antennas focus energy in a specific direction, allowing for better reception and transmission over longer distances. This is particularly useful in telecommunications and broadcasting. In audio equipment, high-gain amplifiers boost weak audio signals, making them louder and clearer. However, excessive gain can lead to distortion, so it's important to balance gain levels for optimal performance. High-gain technology is widely used in various fields, including telecommunications, broadcasting, and audio engineering.