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Posts tagged XLR pinout

XLR or Cannon connectors

Feb25
2013
Written by carbadmin

XLR audio connectors (also known as cannons or mocrophone plugs) can be wired in two different ways depending on your system:

XLR pinouts for balanced line

and

XLR pinouts for unbalanced line

Posted in plug wiring posts - Tagged audio, balanced xlr, Cannon, XLR, XLR female, XLR male, xlr wiring

How to wire an XLR (cannon) audio plug

Feb19
2013
Written by carbadmin



The most commonly used format in audio applications is the 3 pin XLR. Originally produced by Cannon Electronics, and released as the Cannon X range, this led to them being known as ‘Cannon’ connections. The second revison was the Cannon XL (featuring a locking switch) and the third, the Cannon XLR. Thus, this connection became known as an XLR. The XLR is used across a broad range of musical and audio applications, due to the fact that it is both balanced, and a very secure connection. As a general rule of thumb, female XLR plugs usually receive output signals from devices (a microphone, for example), and male XLR plugs are generally used to plug into inputs (a mic pre-amp on a mixing desk, or active studio monitors, for example), with male XLRs plugging into female sockets and vice versa. As a result, he most commonly used XLR cable is the trusty mic lead, featuring a female XLR plug on one end and a male XLR on the other. Common uses are for mic cables, monitor speakers, audio interfaces, PA applications and much more besides.

XLR pinout (balanced)

A balanced system is used in pro audio systems (xlr wiring diagram shown below), with an overall screen covering a twisted pair. Pin 2 on the XLR is ‘hot’ and carries the positive going signal, whilst pin 3 is ‘cold’ and provides the return. Any interference that penetrates the overall braided screen affects both the ‘hot’ and ‘cold’ wires simultaneously, and due to the balanced transformer or electronics at the pre-amplifier is effectively ignored as the pre-amp only amplifies the difference between ‘hot’ and ‘cold’ (a differential amplifier).

XLR/Cannon plug balanced wiring diagram

View from back of male XLR

The female XLR uses the same pin numbering but pins 1 and 2 are reversed .

XLR Pinout (unbalanced)

The unbalanced system is used for high impedance microphones over short distances, and is not recommended for professional use as it is susceptable to RF noise – such as mains power sources, taxi radios etc.

XLR/Cannon blug unbalanced wiring diagram

View from back of male XLR Plug

Pin 1 is shorted to pin 3, at either end of the cable



Tagged xlr wiring

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