XLR or Balanced Input
Balanced connections are used extensively in professional studios and sound reinforcement applications. In addition to ensuring proper grounding between components, balanced signal transmission cancels induced cable noise from the surrounding environment, which is particularly important with long signal cable lengths. Balanced input impedance is 50 kohms.
This speaker is outfitted with a balanced input connection using an XLR jack. This type of jack accepts a three-pin male XLR connector for compatibility with a wide range of equipment.
The XLR jack is configured according to Audio Engineering Society® recommendations for balanced signal cables.
Pin : Shield, Pin : Positive, Pin : Negative

Parent Topic: Analog Input Considerations