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Phantom power is sometimes used by workers in avionics to describe the DC bias voltage used to power aviation microphones, which use a lower voltage than professional audio microphones. Phantom power used in this context is 8–16 volts DC in series with a 470 ohm (nominal) resistor as specified in RTCA Inc. standard DO-214. [19]
Since the 1980s, phantom power has become much more common, because the same input may be used for both powered and unpowered microphones. In consumer electronics such as DSLRs and camcorders, "plug-in power" is more common, for microphones using a 3.5 mm phone plug connector. Phantom, T-power and plug-in power are described in international ...
Other suffixes refer to any accessories supplied with the microphone: when a cable is provided, the model is actually SM58-CN, while the SM58-LC has no provided cable (LC means Less Cable); the SM58-X2u kit consists of the SM58-LC and an inline X2u XLR-to-USB signal adaptor (capable of providing phantom power for condenser microphones, and ...
Phantom power is usually supplied at a nominal 48 volts DC, although lower voltages are permissible and modern microphones will often operate over a wide range. It is common for modern mixers to have a built-in switch-operated 48-volt power supply which supplies all mic inputs with phantom power, thus eliminating the need for bulky external ...
The microphone consisted of four amplifiers, for different powering schemes, and about 20 capsules, for different directional patterns and/or frequency response characteristics (any capsule of the series is compatible with any of the amplifiers). This was the first type of microphone to let the user separate the capsule from the amplifier (body ...
DI boxes which require a power source (batteries or phantom power) are called active DI boxes. A DI unit (direct input or direct inject) is an electronic device typically used in recording studios and in sound reinforcement systems to connect a high output impedance unbalanced output signal to a low-impedance, microphone level, balanced input ...
Electret microphones require no polarizing voltage unlike other condenser microphones, but normally contain an integrated preamplifier which requires a small amount of power (often incorrectly called polarizing power or bias). This preamp is frequently phantom powered in sound reinforcement and studio applications. Other types include a 1.5 V ...
In 1966 Neumann adapted the "phantom powering" method that had been used for years in certain telephone systems, so that a compatible method of powering would allow tube microphones, solid-state microphones and dynamic microphones all to be connected to the same power supplies.