Phantom power, also translated as phantom power, is a technology that uses a sound console to supply power to the microphone in audio engineering. It uses a way of sharing wires between power and audio signals to reduce the connection between the microphone and the audio console. It has very prominent advantages such as wide frequency bandwidth, flat response curve, high output, small nonlinear distortion, and good transient response.
Phantom power is the power supply for the condenser mixer or preamplifier. Phantom power supply is also called Simplex Powering. It is usually 11 to 48 volts direct current, which supplies the polarization of the capacitor head and the power of the amplifying circuit at the same time. Various condenser microphones consume 1 to 12 milliamps of current. Many modern condenser microphones can tolerate voltages from 9 to 54 volts, and they have a rectifier built into them that can accommodate a wide range of voltages.
Phantom power supply requires a balanced connection between the microphone and the power supply. Usually, 3 wires of the XLR plug are used. Pins 2 and 3 supply the same DC voltage, which is relative to the ground potential of pin 1. Generally speaking, the source of phantom power is AC mains, and battery power is only considered in places where there is no AC power, such as in the wild.
The existing phantom power supply is mainly 48V, but there are also many condenser microphones that require independent power supply. For example, the DPA 4003 used in our studio is a special 130V power supply and requires a special power supply box. The pre-amplifier part of the tube microphone requires high voltage. The DC power supply is also provided by a dedicated power supply box.
Phantom power function: a microphone with a balanced link, especially a microphone with an xlr output connector.
Application range: Phantom power supply is usually built into the mixer or microphone preamplifier.
It is worth noting that any type of unbalanced microphone can never be connected to a preamplifier that provides phantom voltage. If it is connected, the microphone will be damaged.