XLR3F

XLR3F is the female version of the 3-pin XLR connector, a common interface in professional audio, broadcast, and live sound environments. The “3F” designation indicates three contacts and the female gender; its mating counterpart is typically designated XLR3M (the male connector). XLR3F connectors are circular with a metal shell and three recessed female contacts arranged in a triangular pattern, and they include a keying notch to ensure correct orientation when mated.

In typical use, XLR3F connectors carry balanced audio signals. The standard pinout assigns pin 1 to ground, pin 2 to hot (positive), and pin 3 to cold (negative). This arrangement supports noise rejection over long cable runs and is widely used for microphones, line-level connections, and many professional audio devices. Cables with XLR3F connectors are normally paired with XLR3M plugs to connect microphones, mixers, preamps, and other equipment.

XLR3F connectors are common on microphones, some panel-mount jacks on audio gear, and in stage boxes or setups requiring a female connection in the signal chain. They are designed for durability in both studio and live settings and are typically used in balanced audio paths to maintain signal integrity.

Manufacturers produce XLR3F connectors in various shell styles, materials, and finishes, with well-known examples from brands such as Neutrik, Switchcraft, and Amphenol. The XLR connector family remains a standard in professional audio due to its locking mechanism, robust construction, and cross-brand compatibility, which facilitates reliable interconnections across a wide range of equipment.