Hi all,
A few threads exist on balanced to unbalanced conversion but this is slightly different.
I read that to invert polarity of a balanced connection, the modification goes; swap pins 2 and 3.
To convert balanced to unbalanced its; pin 3 and 1 tied to sleeve, with 2 (+) to tip:
So is it also possible to rewire this same connection but with polarity inversion?
I.e. 1 and 2 to sleeve instead, with remaining 3 (-) to tip?
Thanks
A few threads exist on balanced to unbalanced conversion but this is slightly different.
I read that to invert polarity of a balanced connection, the modification goes; swap pins 2 and 3.
To convert balanced to unbalanced its; pin 3 and 1 tied to sleeve, with 2 (+) to tip:
So is it also possible to rewire this same connection but with polarity inversion?
I.e. 1 and 2 to sleeve instead, with remaining 3 (-) to tip?
Thanks
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A mixer with balanced out that does not have a polarity button. I need to flip the signal for mixing.
If the mixer has output transformers, then you can do as you described.
If it uses an op amp output circuit instead of a transformer, maybe not.
What's the mixer brand and model?
Probably so, then you can leave the positive polarity pin #2 disconnected
instead of grounding it. The signal level will be halved, though.
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Check the manual, some balanced outputs are designed for automatic unbalanced operation if you short the unused output to ground. (Sometimes also referred to as a bootstrapping balanced/unbalanced output)
Edit: Consulting the Ecler Nuo 2.0 manual it does not appear that the mixer's output supports the feature mentioned so leaving one pin open seems like the best approach.
Edit: Consulting the Ecler Nuo 2.0 manual it does not appear that the mixer's output supports the feature mentioned so leaving one pin open seems like the best approach.
Rane tell us to use connection type 4b for bal to unbal when using electronically balanced and not cross coupled.
But the "next best way to do it" says you should use an input transformer.
But the "next best way to do it" says you should use an input transformer.
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Hi Andrew,
Thanks for that.
Noise wont be an issue really, the connection is to/from is the same device.
4b (attached) looks good. I have doubts about the mod in my 1st post,
I don't think coupling HOT and GND to Sleeve is a good idea.
Won't the (+) signal interact with the input circuit if its indeed tied to the rca jack shield ?
If anything the extension of (-)* will act as an antenna on the output balancing buffers.
*(or in my case + as I'm swapping polarity)
Thanks for that.
Noise wont be an issue really, the connection is to/from is the same device.
4b (attached) looks good. I have doubts about the mod in my 1st post,
I don't think coupling HOT and GND to Sleeve is a good idea.
Won't the (+) signal interact with the input circuit if its indeed tied to the rca jack shield ?
If anything the extension of (-)* will act as an antenna on the output balancing buffers.
*(or in my case + as I'm swapping polarity)
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It all depends on whether the signal source behaves as a floating voltage source between pins 2 and 3 (such as a transformer-coupled or a cross-coupled op-amp output stage) or as two separate voltage sources in antiphase, one between pins 2 and 1 and the other between 3 and 1.
Makes sense now! I don't have schematics, so I will try 4b, test and report back.
I need to buy the Jacks now. The mixer is from a friend.
The application is actually a stereo width mastering trick.
There will be Low Shelf EQ in the feedback loop and channels will be swapped 😉.
I need to buy the Jacks now. The mixer is from a friend.
The application is actually a stereo width mastering trick.
There will be Low Shelf EQ in the feedback loop and channels will be swapped 😉.
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