You can find XLR cables on so many audio devices, including all types of microphones for recording and stage use. The two main reasons why the XLR cables are widely used are; their capability to deliver the 48V phantom power needed to power condenser microphones, and they are balanced cables.
Due to their simple pin assignment, robustness, XLR plugs, and sockets are among the most reliable connections and are widely used in professional equipment. Hardly any sound event technician, DJ, or music producer can do without these connectors.
The term XLR stands for “External Live Return.” It describes the XLR assignment, i.e., the function of the internal wires of the simple 3-pole cable connections. Modern 3-pole XLR cables are known to be a form of balanced cable. These three conductors include; positive, negative, and ground. As shown in the illustration below, Pin 1 is ground, Pin 2 is positive, and Pin 3 is negative. When it comes to the application of cable and connector, Pin 2 and 3 are meant to connect to their corresponding assignment, while the ground is connected to Pin 1. This is the standard way of connecting XLR cables, although there are a few times when dealing with specific equipment that this rule will not be followed.
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