| T O P I C R E V I E W |
| PeterPan |
Posted - 05/05/2011 : 10:58:08 AM
Not sure where to put this thread, but the music performance area seems a good start. In my band, we have a completely self contained system in which all our sound sources get routed through our own mixer. We are very careful about ground loops to prevent excessive hum in performance situations. Ground lifts on virtually everything, a single connection point to allow grounding when needed, all 120 v equipment has its ground pins cut off (!) and plugged into the same "Octopus", etc., etc. All we have to do is plug a pair of line level Right/Left stereo RCA outputs into a sound system, and we're good to go.
But you know the story! If the main "house" soundboard is in a remote location, and conversion from ground referenced RCA style line outputs to balanced outputs aren't provided, then all it takes is one little bit of leakage and you have a ground loop between the stage system and the main PA. The result of course is that all you can do is choose between one level of hum or another, based on whether or not your single point ground lift helps.
So what I want is to have is our own "emergency" isolation system. Something that would allow us to plug our line level RCA outputs into one side, and convert to completely isolated outputs, both RCA and XLR. Maybe such a product already exists and is not too pricey, but my experience is that in the world of performance electronics, the simplest item is pricey enough to be able to easily build 10 for the over the counter price of 1, so I'm open to DIY solutions too.
Any ideas?
(Moderator: Please feel free to move this post if there is a better area for it). |
| 3 L A T E S T R E P L I E S (Newest First) |
| garrigus |
Posted - 05/06/2011 : 10:00:55 AM
Yep, DigiFreq is useful in more ways than one. 
Scott
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| PeterPan |
Posted - 05/05/2011 : 3:42:08 PM
Well how do you like that... targeted advertising at its best. Well I just ordered the PAC SNI-1 RCA Ground Loop Noise Isolator, and will give it a try. In fact I have a gig next Tuesday where I may get to try it out, and it may arrive just in time. For such a low price to solve a problem, its certainly worth a try! |
| garrigus |
Posted - 05/05/2011 : 12:35:43 PM
What about a ground loop isolator like the ones being shown on this page in the ads? I honestly don't know if it will work, but have you tried something like that yet?
Scott
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