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XLR interface

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XLR interface

 


Interface for transmitting various audio signals in sound system

 

XLR interface, commonly known as Cannon connector (Cannon), the initial terminal is "Cannon X" series, the later version adds a spring lock (Latch) to become "Cannon XL" series, and then the contact surface of the terminal is covered with rubber (Rubber), became the source of its acronym XLR

 

There are basically three pins of the XLR terminal, and there can be a larger number of pins.

 

XLR—Cannon X Series

 

 
Commonly known as Cannon, which is completely different from the way RCA (lotus connector) analog audio cables transmit sound directly. The Balanced Analog Audio interface uses two channels to transmit signals with the same but opposite phases Signal.

 


The receiving end equipment subtracts the two sets of signals, and the interference signal is cancelled out, thereby obtaining a high-quality analog signal.

 

This kind of joint is composed of three contacts, namely 1-- Ground; 2--hot end (+ level); 3--cold end (- level), of course, some equipment stipulates that 3 is hot end ( + grade); 2 is the cold end (- grade), which should be clearly seen in the instruction manual of the equipment

 

XLR connectors are the most widely used type of connectors in professional audio systems. They can be used to transmit various audio signals in the audio system. Generally, balanced input and output terminals are connected using XLR connectors.

 

In a sense, the use of XLR connectors is also one of the features that distinguish professional audio systems from civil audio. The benefits are:

 

a. The balanced transmission method is used, which has strong anti-interference ability, which is conducive to long-distance transmission (not more than 100 meters).

 

b. With a spring locking device, the connection is reliable and not easy to pull off.

 

c. The connector specifies the signal flow direction, which is convenient to prevent connection errors

 

XLR plugs are divided into male and female plugs, and sockets are also divided into male and female sockets.

 

Male contacts are pins, while female contacts are jacks. According to the international common practice, the male plug or socket is used as the output end of the signal; the female plug and socket are used as the input end of the signal.

 

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