What is Phantom Power? In simplest terms, phantom power is a method of powering a microphone through the same cable that is sending audio from the microphone. This means only one cable is used to connect, power, and send audio from a microphone. In some cases microphones can be powered in other ways, like with batteries. Most modern microphones used in professional audio use XLR cables which are designed to be balanced and have the added benefit of powering the microphone. SonicMix.com is an online resource and information hub for all things audio related. We provide guides, reviews, how-tos, and more for record collectors, audiophiles, and music lovers. Visit our site to explore topics and learn more!