Now its time to introduce a jack that most associate with the “professional”world….the XLR! In this case, the XLR3
The XLR3 carries three signal wires, usually a positive, negative and a ground. It is extremely important to know how your gear is wired, as the AES standard is pin 2 hot, but many manufacturers go with pin 3 hot. Check with your multimeter to be sure!
The XLR is commonly used in the analog world for microphone cables and balanced, line level cables, and in digital audio as the connector for the AES/EBU digital audio format.