幻想供电是在专业音响中向话筒（麦克风）供电的技术。 它采用电源与音频信号公用导线的方式减少了话筒（麦克风）到调音台的连线。

Phantom power, in the context of professional audio equipment, is DC electric power transmitted through microphone cables to operate microphones that contain active electronic circuitry. It is best known as a convenient power source for condenser microphones, though many active direct boxes also use it. The technique is also used in other applications where power supply and signal communication take place over the same wires.