Direct coupling refers to a method of connecting two systems or components directly without any intermediary devices. This approach allows for efficient transfer of energy or signals, as there are no additional elements that could introduce delays or losses. It is commonly used in various applications, such as in electrical circuits and mechanical systems. In audio equipment, for example, direct coupling can enhance sound quality by ensuring a clear and uninterrupted signal path. This technique contrasts with indirect coupling, where components are linked through transformers or capacitors, which may alter the signal. Direct coupling is favored for its simplicity and effectiveness in many engineering fields.