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It is a microphone cable
It's also called XLR. If it has pins, it's XLR male, if it has holes, it's XLR female.
It is used to connect microphone to microphone preamplifiers.
To connect a microphone with an XLR output to an amplifier using an XLR to amp cable, simply plug one end of the XLR cable into the microphone and the other end into the amplifier. Make sure both devices are powered on and adjust the volume levels as needed for clear sound output.
XLR refers, not to the cable (wire) per se, but actually to the type of connector used. An XLR connector has 3-pins and is used primarily in audio. Professional microphones and other audio equipment use it. Of the three pins, two are for the balanced signal, and one is for the shield. The wire used then is a two conductor shielded cable using a braided wire or a foil shield. So, an "XLR cable" refers to a two conductor, shielded cable with XLR connectors on each end.
Connector and impedance
An XLR to USB cable has a converter in it. It isn't just a cable. An audio interface can be used to allow you to use any dynamic microphone or instrument and connect it to the USB or Firewire interface with an XLR cable.
An XLR cable is primarily used to transmit balanced audio signals, commonly found in professional audio equipment such as microphones, speakers, and mixers.
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To connect an XLR microphone to your audio interface, you will need an XLR cable. Plug one end of the XLR cable into the microphone and the other end into the XLR input on your audio interface. Make sure to turn on phantom power if your microphone requires it. Adjust the input levels on your audio interface and computer settings to ensure proper recording levels.
To connect a microphone with an XLR output to a device with a 1/4 inch input using an XLR to 1/4 mic cable, simply plug the XLR end of the cable into the microphone and the 1/4 inch end into the device's input. Make sure both ends are securely connected for optimal sound quality.
To ensure your audio equipment receives the necessary power through an XLR cable, you should use a balanced XLR cable and connect it to a compatible power source, such as a mixer or audio interface. Make sure the cable is securely connected and check for any damage or interference that could affect the power transmission.