What is a Phantom Power?

Phantom power is a method of supplying electrical power to certain types of microphones through the same cable that carries the audio signal. It is most commonly used to power condenser microphones and some active direct boxes.

Phantom power typically provides 48 volts of DC power, often referred to as +48V, and is delivered through the XLR microphone cable from a mixer, audio interface, or microphone preamp. This power allows the microphone’s internal electronics and condenser capsule to function properly.

Dynamic microphones usually do not require phantom power, although they can typically tolerate it when connected properly. Phantom power is an essential feature in many recording and live sound setups because it allows condenser microphones to operate without needing separate external power supplies.