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As a last resort a balanced audio line can be fed into an unbalanced input and vice versa as long as the electronic design used for the output stage is known. In the case of balanced output to unbalanced input, the negative output can be tied to ground, but in certain cases the negative output should be left disconnected. [4]
XLR3 cable connectors female (left) and male. The XLR connector is a type of electrical connector primarily used in professional audio, video, and stage lighting equipment. XLR connectors are cylindrical, with three to seven connector pins, and are often employed for analog balanced audio interconnections, AES3 digital audio, portable intercom, DMX512 lighting control, and for low-voltage ...
Two pins are used for the mono headphone signal and two pins for the unbalanced microphone signal. The 4-pin XLR connector is also commonly used on amateur radio microphones, but transferring unbalanced audio instead, and using the 4th pin (with the common ground) for a push-to-talk (PTT) circuit activated by a button on the microphone.
This includes the original 6.35mm (quarter inch) jack and the more recent and standard 3.5mm (miniature or 1/8 inch) and 2.5mm (subminiature) jacks, both mono and stereo (balanced) versions. [2] XLR connectors, also known as Cannon plugs, used for analog or digital balanced audio with a balanced line. Digital audio interfaces and interconnects:
Typically, higher-end mixers will have balanced inserts and entry-level mixers will have unbalanced inserts. Balanced inserts appear as a pair of jacks, one serving as the send (out from the mixer) and the other serving as the return (back to the mixer). Balanced insert jacks can be XLR, 1/4" TRS phone connector or Bantam (TT).
A signal transmitted over a balanced line. The signal is kept intact while the noise (which appears as a common-mode signal at the receiving end) is rejected perfectly.. In telecommunications and professional audio, a balanced line or balanced signal pair is an electrical circuit consisting of two conductors of the same type, both of which have equal impedances along their lengths, to ground ...
But this could be a huge problem when going from balanced to unbalanced signals, as when using an unbalanced, XLR-equipped, pin-3-hot signal processing device (like older Klark Teknik compressors and gates) with a mixing desk that had unbalanced insert points and insert cables that wired the insert connnector's shield to pin 3.
Professional equipment commonly uses balanced connections on 6.35 mm (1/4 inch) TRS phone jacks or XLR connectors. Professional equipment may also use unbalanced connections with (1/4 inch) TS phone jacks.