Hardware & signal path
Phantom power
Phantom power is 48 volts sent up a balanced microphone cable by a mixer or interface to power a condenser microphone. It is switched on at the input, and most DJ equipment does not provide it.
In practice
A condenser mic needs 48V and most DJ mixers do not have it — bring a dynamic instead.
Use a dynamic microphone for anything on a dance floor. If you genuinely need a condenser, check the mixer has a phantom switch before the night rather than in front of a room, and switch it on with the channel faded down — the surge is audible and unpleasant through a system. Turn it off the same way before unplugging anything. Phantom power is harmless to most dynamic microphones on a balanced connection, but it is not harmless to ribbon microphones or to unbalanced connections, so leave it off unless something in the chain actually needs it.
48 volts
What it supplies
Condenser only
What needs it
Fader down
How to switch it
Where these come from: Microphone standards and booth practice, not catalog figures. For what we can measure, see the connection it travels on.
Why it matters
It is the reason a borrowed microphone sometimes produces nothing at all. A condenser needs powering and a dynamic microphone does not, so a condenser plugged into a DJ mixer with no 48V switch is silent while the same cable and channel work perfectly with a dynamic.
Which is also why the microphone in almost every booth is dynamic. They need no power, survive being dropped, and reject the room behind them — three properties that matter far more on a dance floor than the extra detail a condenser gives you.
Frequently asked
Do DJ mixers have phantom power?+
Most do not. Club mixers assume a dynamic microphone on the mic input, which is why a borrowed condenser often produces nothing at all.
Does phantom power damage dynamic microphones?+
Not on a balanced connection — a dynamic simply ignores it. Ribbon microphones and unbalanced connections are the real risk, so leave it off unless something needs it.
Should you use a condenser mic for DJing?+
Rarely. A dynamic rejects the room behind it, survives handling, and needs no power. On a dance floor those matter more than the detail a condenser adds.
Related terms
Balanced and unbalanced
A balanced connection carries the signal twice, once inverted, and cancels anything picked up along the way. An unbalanced one carries it a single time, so interference picked up by the cable stays in the signal.
RCA and XLR
RCA is the unbalanced two-channel connector on players, turntables and consumer gear. XLR is the balanced three-pin connector used for long runs and microphones, and it locks into place.
Line level
Line level is the standard signal strength equipment sends between devices — a player into a mixer, a mixer into an amplifier. It is far stronger than a microphone or turntable signal, which need preamplifying first.
Soundcheck
A soundcheck is the time before doors to test your setup through the venue system — levels, monitoring, connections — so that nothing is discovered for the first time in front of a room.
Explore: Mixing guides · Audio interface · Gain · All DJ terms