XLR connector
Videos
The XLR connector is a type of electrical connector primarily used in professional audio, video, and stage lighting equipment. XLR connectors are cylindrical in design, with three to seven connector pins, and are often employed for analog balanced audio interconnections, AES3 digital audio, portable intercom, DMX512 lighting control, and for low-voltage power supply. XLR connectors are included to the international standard for dimensions, IEC 61076-2-103. The XLR connector resembles the DIN connector, but is larger, more robust and is physically incompatible with it.
XLR3 cable connectors female (left) and male
Male and female XLR connectors with different numbers of pins
XLR-LNE three-pin male and female connectors, originally used for mains power connections. The connecting pins in the male connector are recessed and the sockets in the female connectors are shrouded for safety. This example is a panel socket, used as a power input from the male plug, though they were also used in the opposite configuration.
Left to right: Cannon XLR3-12C (line), Switchcraft X3F (line), Neutrik NC3MP panel, Neutrik NC3FP panel
AES3
Videos
AES3 is a standard for the exchange of digital audio signals between professional audio devices. An AES3 signal can carry two channels of pulse-code-modulated digital audio over several transmission media including balanced lines, unbalanced lines, and optical fiber.
BNC connector, used for AES-3id connections.