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<blockquote data-quote="John Roberts" data-source="post: 27053" data-attributes="member: 126">Re: Ebtech HumXThis is not all that mysterious. Some audio gear is less tolerant of environmental noise issues than others... This may vary from venue to venue but is not necessarily the venue&#039;s problem. The noise isn&#039;t bothering them, so as long as they don&#039;t shock their workers or patrons they are happy. &quot;Ground loop&quot; is widely used as generic description for mains power related noise issues. Ground loops have a specific meaning which is mostly academic and unimportant for properly designed (wrt XLR pin 1) differential i/o gear. A bass amp with an unterminated instrument cable plugged in, that is picking up hum, does not mean anything, other than the bass amp is turned on and working, and there is hum in the room,, normal for most rooms.All gear will makes some hum and hiss, so it it is reasonably low and not massing with the performance your work is done. JR</blockquote>

[QUOTE="John Roberts, post: 27053, member: 126"] Re: Ebtech HumX This is not all that mysterious. Some audio gear is less tolerant of environmental noise issues than others... This may vary from venue to venue but is not necessarily the venue's problem. The noise isn't bothering them, so as long as they don't shock their workers or patrons they are happy. "Ground loop" is widely used as generic description for mains power related noise issues. Ground loops have a specific meaning which is mostly academic and unimportant for properly designed (wrt XLR pin 1) differential i/o gear. A bass amp with an unterminated instrument cable plugged in, that is picking up hum, does not mean anything, other than the bass amp is turned on and working, and there is hum in the room,, normal for most rooms. All gear will makes some hum and hiss, so it it is reasonably low and not massing with the performance your work is done. JR [/QUOTE]

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