Phantom power is often indicated on audio equipment as what?

Phantom power is a method used to provide power to microphones, specifically condenser microphones, over the same cable that carries the audio signal. This power is typically supplied at +48V. This voltage level is standard in professional audio environments, ensuring that the microphones receive sufficient power for their internal electronics to function properly, including the preamps and active circuitry. The use of +48V enables a balanced audio signal, helping to minimize noise and interference over long cable runs.

Other voltages, although they might be used in specific contexts or with certain equipment, do not represent the widely accepted standard for phantom power in professional audio applications. Thus, those other options do not convey the same level of industry standardization and compatibility that +48V does in the context of phantom power.