Editing Phantom circuit (section)

==Phantom microphone powering==
{{main|Phantom power}}

[[Condenser microphones]] have impedance converter ([[current amplifier]]) circuitry that requires powering; in addition, the capsule of any non-[[electret]], non-[[RF]] condenser microphone requires a polarizing [[voltage]] to be applied. Since the mid- to late 1960s most [[balanced]], professional condenser microphones for recording and broadcast have used phantom powering.<ref>{{Cite web |last=Alecia |date=2024-11-30 |title=Phantom Power for Microphones Explained In-Detail [Upd. 2024] |url=https://primesound.org/phantom-power/ |access-date=2025-03-10 |website=Prime Sound |language=en-US}}</ref> It can be provided by outboard AC or battery supplies, but nowadays{{when|date=August 2024}} is most often built into the mixing console, recorder or [[microphone preamplifier]] to which the microphones are connected.

By far{{Weasel inline|date=August 2024}} the most common circuit uses +48 V DC fed through a matched pair of 6.8 kΩ [[resistor]]s for each input channel.{{citation needed|date=August 2024}} This arrangement has been standardized by the [[International Electrotechnical Commission|IEC]] and [[ISO]], along with a less-commonly-used arrangement with +12 V DC and 680 Ω feed resistors.

As a practical matter, phantom powering allows the same two-conductor shielded cables to be used for both [[dynamic microphones]] and condenser microphones, while being harmless to balanced microphones that aren't designed to consume it, since the circuit balance prevents any substantial DC from flowing through the output circuit of those microphones.