As the standard configuration of professional audio equipment, the importance of XLR plug is self-evident. This article will elaborate on the origin, structure, balanced transmission principle and other aspects of XLR connector, and combine it with actual application scenarios to unveil the mystery of XLR for you.
Table of Contents
What Is XLR Connector?
XLR plug, also known as XLR head, is a kind of connecting cable widely used in the professional audio field. Its balanced transmission method can effectively suppress noise and interference and ensure the purity of audio signals. XLR interface is generally divided into male and female, male for output and female for input. XLR cable is usually used to connect microphones, mixers, amplifiers and other equipment, and is a must-have in recording studios, stage performances, live broadcasts and other occasions.
Why is the XLR plug called a Cannon plug?
In fact, we can guess from its English expression that it is cannon plug or cannon connector. The founder of the plug, Mr. James H. Cannon, is the founder of Cannon Electric. Now the company has been incorporated into ITT Corporation, which is the original manufacturer of Cannon plugs.
The earliest product was the “Cannon X” series. Later, the product was improved and a latch was added (the English name of the latch is Latch, which is actually a locking device). The product series was renamed “Cannon XL”. Then, rubber sealing glue (Rubber compound) was added around the metal contacts of the plug. Finally, people put the first letters of these three words together and called it “XLR Connector”, that is, XLR connector. It should be reminded here that the XLR connector can be 3-pin, 2-pin, 4-pin, 5-pin, or 6-pin. Of course, the most common connector we use is the 3-pin Cannon plug, that is: XLR3.
3-Pin XLR Audio Pinout
Due to the use of a locking device, the XLR connection is quite reliable. XLR connectors are usually found on microphones, electric guitars, and other devices. XLR connectors are special in that they can be used not only as connectors for analog audio signals, but also as connectors for digital audio signals. The following figure shows the definition of each pin when the XLR connector is connected in a balanced manner.
Modern 3-pin XLR cables are a form of balanced cable, which means that they have three conductors: positive, negative and ground. In most normal applications, pin 1 is ground, pin 2 is positive (as documented in the AES14-1992 standard, also commonly referred to as “pin 2 hot”), and pin 3 is negative. When attaching the connector to the cable, pin 2 and 3 will be connected to their respective positive/negative wires and the cable’s shielding will be connected to pin 1.
Why choose XLR plug?
Balanced Transmission
XLR jack adopts balanced transmission mode, that is, the signal line is divided into two, transmitting positive phase and reverse phase signals respectively. This method can effectively offset external electromagnetic interference and ensure the purity of audio signals, especially in long-distance transmission.
Strong Anti-interference Ability
Due to the characteristics of balanced transmission, XLR interface has strong resistance to external noise, making audio signals less likely to be distorted during transmission.
Stable Connection
The mechanical structure design of XLR interface is unique, and the plug-in force is large, ensuring the stability of the connection. This is very important for professional audio equipment, which can avoid audio interruption or noise caused by poor connection.
Wide Compatibility
XLR interface is standard for professional audio equipment. Almost all microphones, mixers, audio interfaces and other equipment are equipped with XLR interface, which is convenient for connection between different devices.
Wide Range of Applications
XLR interface is not only used in professional audio fields such as recording studios and stage performances, but also widely used in live broadcast, podcast, conference system and other fields.
Choosing the Right XLR Cable for Your Needs
Selecting an appropriate XLR cable depends on your specific needs and the nature of your audio equipment. Consider the length you require, the durability of the cable, and whether a gold-plated XLR cable might be helpful for your setup. If you’re working with professional-level equipment, XLR pure audio cables can offer premium sound quality.
Notes:
- Don’t Blindly Pursue High Prices: The more expensive the cable, the better it is. The best one is the one that suits you.
- Pay Attention To The Compatibility Of XLR Cable: Make sure the selected cable is compatible with your device.
- Check The XLR Cable Regularly: Check the cable regularly for damage and replace it in time.
Final Thoughts
The use of XLR plugs is considered the optimal choice in the realm of professional audio. Their balanced transmission, coupled with their anti-interference characteristics, makes them a common feature across various audio devices. Regardless of whether you are a recording engineer, a stage sound engineer, or a simple audio enthusiast, having a comprehensive understanding of XLR plugs can significantly aid you in constructing a more efficient audio system and achieving superior sound quality.
If you want to know more about XLR plugs, please leave a message in the comment area. Or, you can view our recommended XLR cable products.
