Phantom Power Supply for Condenser Microphones

- Feb 22, 2019-

Condenser microphones require phantom power to drive their internal circuitry.

Phantom Power uses a 2-core shielded cable to power the microphone. The phantom power can be provided by a standalone device or by a mixer (via a microphone connector).

The microphone receives power through the same cable and sends an audio signal to the mixer. This is called "phantom" because the power supply does not require a separate cable, but is "hidden" in the cable used for signal transmission.

According to DIN standard 45596, the voltage of pin 2 and pin 3 of XLR is higher than the voltage of pin 1 (12-48V DC) when using phantom power. There is no voltage difference between pin 2 and pin 3. Pin 1 is grounded, pin 2 is audio positive, and pin 3 is audio reverse polarity.

In addition, the voltage at pin 1 is 0 volts, pin 2 has a positive voltage, and pin 3 has exactly the same positive voltage as pin 2. On many consoles, the phantom power switch will be labeled "P48", which stands for "48V phantom power."



MAONO is an innovative designer and manufacturer of Lavalier, Podcasting, Wireless, Shotgun, Recording microphones and accessories for Smartphone, Camera and PC, etc.