啊哈
http://forum.qscaudio.com/forum/viewtop ... f=2&t=3574===================================================================================================================
There is no "American" or "European" XLR pinout.
The AES adopted a standard of pin 2 = + (or "hot") and pin 3 = - (or "cold") back in 1992 (http://www.aes.org/publications/standar ... m?docID=19). Before that, it was haphazard, with some manufacturers using pin 2 + polarity and others using pin 3 +. It's possible that more European manufacturers used one than the other and more American manufacturers used the opposite (perhaps a point of confusion for Marantz); I only know that there was quite a mix (QSC has always used pin 2 +, but in the early 90s I worked for another US power amp manufacturer that used pin 3 +), and probably the overall number tilted a bit in favor of pin 2. At the September 1990 AES Convention in Los Angeles, the LA section spoofed that lack of decisive coordination by handing out "XLR Polarity Indicator" spinner cards; the possible results were "Pin 2 +," "Pin 3 +," and "Spin again."
Fortunately, for any processor, cable, or other device with balanced XLR input and XLR output, there is no polarity issue as long as it is the same from in to out. For other audio devices that convert between balanced and unbalanced, such as microphones, power amps, DI boxes, etc., polarity doesn't matter much as long unless you're using multiple ones (i.e., more than one amp) with different polarities.
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繼續搜尋XD
A brief history of the XLR connector.
http://www.soundfirst.com/xlr.html============================================================================================================
In 1950, Ampex adopted a pin-2-return, pin-3-positive convention for the wiring of the XL type connector, which was quickly copied by other USA based manufacturers. The introduction to the AES14 Standard said "Nevertheless, the pin-2-positive polarity convention was adopted for all audio levels by manufacturers outside the USA and was standardized, explicitly for microphone use, in 1975 by the International Electrotechnical Commission in its Publication 268, Part 12. The USA National Committee of IEC did not object to approval of the standard. The convention was subsequently approved for all applications by the Society of Motion Picture and Television Engineers in its Polarity for Analog Audio Magnetic Recording and Reproduction, RP-134-1986, and by the European Broadcast Union in its Conservation of the Polarity of Audio Signals in Radio and Television Production Installations, EBU Technical Recommendation R50-1988. In its deliberations, the AES working group determined that a considerable majority of manufacturers and users in the USA are now following this convention. The group also determined that the designation XLR is now generic and carries no proprietary restrictions on its use." In 1990 the AES14 Standard settled on the use of the pin 2 high convention and ended years of confusion in the marketplace.
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http://en.wikipedia.org/wiki/XLR_connectorPrior to the introduction of this standard, the wiring of pins 2 and 3 varied.
The pin 2 "hot" and pin 3 "cold" convention was typically used by European and Japanese equipment manufacturers, but American companies used pin 3 "hot" and pin 2 "cold". This caused problems when interconnecting equipment with unbalanced connections. The pin 3 "hot" convention is now obsolete but is still found on vintage equipment.[12] Pin 1 has always been ground and/or shield if the cable is shielded, and many connectors connect it internally to the connector shell or case.
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還有幾篇其他文章一同看起來應該是
美國以前有些機器是2- 3+, 但是現在統一規格了?
所以Google很大部分的中文網頁中宣稱
美規是 1地 2+ 3-
歐規是 1地 2- 3+
顯然有點問題...(小聲)
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哈哈KAWASAKI讚~
發表於 : 週一 7月 16, 2012 3:20 pm
找到同志了