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XLR to 1/4 Mono specification users reports and reviews

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2012-11-22 16:49:43rev. 1INCORRECTThe XLR plug is a symmetric connector; the positive signal on 2 is called "hot" and the negative signal on 3 is called "cold". Even if the symmetric design of a microphone could be squashed by attaching pin 3 to GND, this is not the name of the pin. Also, connecting 3 *and* 1 to GND is advised against, as 1 is supposed to be in the middle. Your mileage may vary if you connect both. As it may vary if you forego the symmetry. My advice would be to connect hot/2 to a stereo right channel, and cold/3 to stereo left, and 1 to GND. Then, sample in stereo and calculate R-L (possibly halved) to gain the benefits of symmetry.APPROVED
2016-06-03 03:02:42rev. 2CORRECTThis is correct assuming that the cable used is a two wire (1 conductor and 1 shield) cable. And also only when working with high level signals. If a three wire standard microphone cable is used, the third pin is a signal -. It is to be connected to the sleeve (pin 2-ground) at the 1/4 in. connector. For a low level signal, note that a standard XLR connection is for a "balanced" input, which is normally a low impedance input. The 1/4 inch is normally high impedance. A mismatch will cause a sometimes considerable loss of signal at low signal levels normally found in a microphone source. The correct way to connect the two without signal loss is by an impedance matching transformer, or "balanced to unbalanced" matching device (or more commonly referred to as simply a "balun".) I submit this explanation in hopes of forestalling anyone complaining about "I used the info from pinouts.ru and I can't get the gain I need"APPROVED
2020-09-05 18:38:30rev. 3CORRECTAPPROVED

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Pinouts.ru > Pinout of Professional audio / entertainment devices XLR to 1/4" Microhpone Cable
should be correct