How to Connect a Microphone to an Amplifier
Updated Nov 13, 2026 · By 
Jonah Mercer · Editorial policy
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Connect a microphone to an amplifier with a 3-pin XLR cable: plug the female end into the microphone and the male end into the amplifier XLR input. Turn the amplifier on with the gain down, then raise the gain to the level you want. A condenser microphone also needs 48V phantom power from the amplifier or a separate supply.
Match the microphone output to the amplifier input
Microphones with an XLR output use a 3-pin XLR connector, and the amplifier needs a matching 3-pin XLR microphone input. If the amplifier has a 1/4-inch input only, it takes a line or instrument signal, not a microphone signal, so check the input label on the amplifier first.
Choose a cable length that reaches the amplifier
Measure the run from the microphone stand to the amplifier, then pick a cable that covers it with slack to spare. The EBXYA cable is 50 ft and comes as 2 cables in a pack, the Augioth cable is 15 ft in a 2-pack, and the STMIDVG cables are 3 ft in a 4-pack. A cable that is too short pulls on the connectors, and a long cable coiled on the floor stays out of the way.
Connect the microphone cable to both ends
Plug the female XLR connector into the microphone until the latch clicks, then plug the male XLR connector into the amplifier microphone input. Keep the amplifier gain down and the amplifier off while you connect, then switch it on. The EBXYA and STMIDVG cables use locking connectors that hold until you press the release.
Check phantom power for a condenser microphone
Find out whether the microphone is a condenser or a dynamic microphone, since only a condenser needs phantom power. If the amplifier or mixer has a 48V switch, turn it on after the cable is connected.
Set the gain and check the sound
Start with the amplifier gain down, then speak or sing into the microphone and raise the gain slowly until the signal comes through at the level you want. If the sound is faint, check that the cable is fully seated and that phantom power is on for a condenser microphone. If it hums or buzzes, check the cable seating and try another XLR input.
What you need
EBXYA XLR Cable 50ft 2 Packs Microphone Cable
A 50 ft 3-pin XLR male-to-female cable in a 2-pack, with oxygen-free copper conductors and a braided shield, for connecting a microphone to an amplifier, mixer or speaker system.
- Cables in pack: 2
- Oxygen-free copper
- Shielded
- Length: 50 ft
Augioth XLR Mic Cable 15 ft
A 15 ft 3-pin XLR male-to-female cable in a 2-pack, with a green nylon braid and metal connectors, for a microphone, amplifier, mixer or speaker system.
- Cables in pack: 2
- Oxygen-free copper
- Shielded
- Length: 15 ft
STMIDVG 4 Pack XLR Microphone Cable
A 3 ft 3-pin XLR male-to-female cable in a 4-pack, with double shielding and a locking latch on the connectors, for a mixer, microphone, speaker or amplifier.
- Cables in pack: 4
- Shielded
- Length: 3 ft
MEIRIYFA XLR Cable Microphone Cable 3pin XLR
A 2M XLR pigtail cable with a gold-plated XLR connector and 3 bare wire ends, for repair or replacement of a microphone or speaker cable.
- Oxygen-free copper
These come from our ranked list Best XLR Cable for Amplifier, which compares them spec by spec.
Frequently asked questions
Can I plug a microphone straight into any amplifier?
Only if the amplifier has a microphone input. A microphone with a 3-pin XLR output needs an XLR input or a separate preamp, while an amplifier with only a line or instrument input will not take the microphone signal directly.
Do I need phantom power to connect a microphone?
A condenser microphone needs 48V phantom power, from the amplifier, mixer or a separate supply. A dynamic microphone does not need it.
Which end of the XLR cable goes into the microphone?
The female XLR connector goes into the microphone, and the male XLR connector goes into the amplifier input. The locking latch on the connector holds it in place until you press the release to unplug it.
Ranked XLR cables lists
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