--- title: "ONE: What is phantom power?" description: "ONE: What is phantom power?" --- [Skip to content](https://knowledge.apogeedigital.com/one-what-is-phantom-power#main-content) English Show submenu for translations [Contact us](https://knowledge.apogeedigital.com/kb-tickets/new?hsLang=en) ![Apogee Logo White.png\]](https://knowledge.apogeedigital.com/hs-fs/hubfs/Apogee%20Logo%20White.png?height=40&name=Apogee%20Logo%20White.png) Open main navigation Close main navigation - English Show submenu for translations - [Contact us](https://knowledge.apogeedigital.com/kb-tickets/new) - Go to apogeedigital.com Go to apogeedigital.com How can we help you? - There are no suggestions because the search field is empty. 1. [Knowledge Base](https://knowledge.apogeedigital.com/?hsLang=en) 2. [Legacy Products](https://knowledge.apogeedigital.com/legacy-products?hsLang=en) 3. [One](https://knowledge.apogeedigital.com/legacy-products?hsLang=en#one) # ONE: What is phantom power? Phantom power (also known as 48V) is a DC voltage necessary to power condenser microphones such as the Neumann U87 or AKG 414. If you’re connecting a condenser mic to ONE, be sure to select Ext 48V Mic in the Maestro Control Input menu.  Phantom power is supplied to the mic via the same cable used to transmit the audio signal from the mic. 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