XLR Definition - What is XLR?
What does XLR stand for?
An XLR connector is a type of electrical connector primarily used in professional audio/visual and stage lighting equipment. XLR stands for "External Line Return". XLR connectors were invented as a means of passing large electrical currents cleanly, while providing a standardized connector for most types of audio devices, such as speakers, mixing boards, amplifiers, microphones, and other recording equipment.