| Question: What does this connector look like? |
| XLR Jack
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XLR Plug
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| Question: What variations of this connector are available? |
Answer: XLR connectors primarily vary in the number of pins. The most common connector is the three-pin XLR connector shown above.
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| Question: What is this connector used for? |
Answer: XLR connectors are used in custom "pro" audio hookups to connect microphones to PA amplifiers, mixers or extension cords. These hookups are balanced, which helps cut out noise and hum pickup. A balanced line consists of three paths of current flow, using a cable consisting of a pair of twisted wires with a shield covering them. The twisted pair would carry the actual audio signal while the overall shield acts as a noise absorbing barrier. The shield is typically connected to ground.
These connectors are based on the 3-pin circular connectors invented by ITT Cannon. "XLR" is their series prefix. It is now used as a generic description.
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| Question: What cable or cables are used with this connector? |
Answer: 3-pin XLR connectors require twisted-pair cable with either braided shielding or foil shielding and a drain wire.
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| Question: How is this connector attached to the cable? |
Answer: While some manufacturers may vary, the AES and EIA have set standards for XLR connector hookup that are followed by most of the industry:
| XLR Pin |
Function |
Cable |
| Pin #1 |
Ground |
Shielding or drain wire |
| Pin #2 |
High (+) |
Twisted pair conductor #1 |
| Pin #3 |
Low (-) |
Twisted pair conductor #2 |
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| Question: Where can I get this type of connector? |
Answer: XLR connectors can be ordered on-line, through your local RadioShack store, or by calling our order center at 800-241-8742.
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