What does "phantom power" refer to?

"Phantom power" specifically refers to a method of supplying power to condenser microphones. This technique involves sending a voltage through the microphone cable, allowing the condenser microphone to operate without needing a separate power source or battery. This is essential for condenser microphones, which require power to function properly, as they utilize a diaphragm that needs to be electrically charged.

When phantom power is used, it typically provides a standard voltage, often 48 volts, through the XLR cable. This makes it convenient for live sound and recording applications since it simplifies the setup by eliminating the need for additional batteries or external power sources.

The other options mentioned do not accurately describe what phantom power is. While some microphones may use batteries, phantom power is distinct because it utilizes the existing audio cable infrastructure. Enhancing signal quality and editing audio files involve other techniques unrelated to providing power to microphones.