XLR connector
TL;DR
XLR is the 3-pin round audio connector used for balanced analog signals - pro audio standard. Very robust locking mechanism. See "Balanced XLR" for the electrical protocol; this entry covers the physical connector.
XLR is a physical 3-pin round audio connector originally developed by Cannon (called “Cannon X” then “XLR”). Universal in professional audio – microphones, mixers, powered speakers, patch bays.
3-pin XLR pinout
- Pin 1 – Ground / Shield
- Pin 2 – Signal + (hot)
- Pin 3 – Signal – (cold, inverted)
Why the pro world loves XLR
- Locking latch – won’t pull out accidentally
- Metal shell – shields from RF interference
- Balanced 3-conductor design – see Balanced XLR for details
In consumer hi-fi
XLR is showing up more in budget audiophile gear thanks to premium products like AIYIMA D20, Fosi Audio S3, HiVi H6. See dedicated Balanced XLR entry for sonic benefits.
Ready to see this in action?
Browse honest, hands-on reviews of budget hi-fi gear that puts these concepts to the test.
