XLR Connector - Phantom Power

Phantom Power

Some microphones such as condenser microphones require power. An alternative to battery power is phantom power, which consists of direct current applied equally through the two signal lines of a balanced audio connector (in modern equipment, usually an XLR connector). The supply voltage is referenced to the ground pin of the connector (pin 1 of an XLR), which normally is connected to the cable shield or a ground wire in the cable or both. When phantom powering was introduced, one of its advantages was that the same type of balanced, shielded microphone cable that studios were already using for dynamic microphones could be used for condenser microphones as well, in contrast to vacuum-tube microphones, which required special, multi-conductor cables of various kinds.

Phantom power is usually supplied at a nominal 48 volts DC, although lower voltages are permissible. XLR connectors are typically used to supply phantom power because TRS connectors present a brief short circuit when they make and break connection.

Read more about this topic:  XLR Connector

Famous quotes containing the words phantom and/or power:

    She was a phantom of delight
    When first she gleamed upon my sight;
    A lovely apparition, sent
    To be a moment’s ornament;
    William Wordsworth (1770–1850)

    I never saw love as luck, as that gift from the gods which put everything else in place, and allowed you to succeed. No, I saw love as reward. One could find it only after one’s virtue, or one’s courage, or self-sacrifice, or generosity, or loss, has succeeded in stirring the power of creation.
    Norman Mailer (b. 1923)