The term "1/4-inch TRS" refers to a type of audio connector that has a 1/4-inch diameter and features three contact points: tip, ring, and sleeve. This connector is commonly used in professional audio equipment, such as guitars, mixers, and headphones, allowing for balanced audio signals and reducing noise interference. TRS stands for "Tip-Ring-Sleeve," which indicates the three sections of the connector. The tip carries the left audio channel, the ring carries the right audio channel, and the sleeve serves as the ground. This design makes 1/4-inch TRS connectors ideal for stereo audio applications.