Pinouts >  Audio / Video hardware connectors
3 pin XLR male connector layout
3 pin XLR male connector
The XLR connectors are used mostly in professional audio and video electronics cabling applications. Home audio and video electronics normally use RCA connectors. There is no common pinout - it's depends on application.

Balanced Audio (3 pole XLR):

Pin Signal Description
1 Ground / Screen / Earth  
2 In phase / +ve / Hot  
3 Out of phase / -ve / Cold  

Unbalanced Audio (3 pole XLR):

Pin Signal Description
1 Ground / Screen  
2 Signal  
3 Ground / Screen (connect to pin 1)  


Application Pin 1 Pin 2 Pin 3 Notes
D54 Screen No
Signal (analogue multiplex) Strand analog multiplex - 384 channels
Sometimes uses an XLR4 connector for compatibility with AMX192
DMX512 (DMX) Screen Data - Data + Digital multiplex - 512 channels
Standard connector is the XLR5
Audio Signal
Screen Signal +
Signal -
Black Yellow White Remote from above (cable rear)
Canford Talkback backbone earth/screen +24V DC audio  
High End Systems intelligent fixtures control ground data - data +  
Martin intelligent fixtures control (old) screen data + data - this is not the same as 3-pin DMX!
Martin intelligent fixtures control (new) screen data - data + Martin have now changed to be pin compatible with 3-pin DMX
Microphones (Europe standard) screen signal + signal -  
Microplex common +15 VDC data  
AKG K702 headphones ground right left it is mini XLR connector
AES/EBU ground Signal Signal Standard for the exchange of digital audio signals between professional audio devices. (110ohm)


3 pin XLR female connector layout
3 pin XLR female connector
According to 17 reports in our database (14 positive and 1 negative) the 3 pin XLR connector pinout should be correct.

Is this pinout
3 pin XLR connector visual pinout:click to enlarge
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