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Balanced Output Circuit Variations versus Noise
Balanced Output Circuit Variations versus Noise
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Old 21st January 2019, 10:22 PM   #11
rsdio is offline rsdio  United States
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Originally Posted by billshurv View Post
Thanks for that link. Quoting from page 8, "Unless there are pressing reasons to build an electronically floated output I shouldn’t bother."

There are certainly many cases where the reason is pressing, but not when you can control what device is connected to the output.
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Old 21st January 2019, 10:30 PM   #12
billshurv is online now billshurv  United Kingdom
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Balanced Output Circuit Variations versus Noise
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Originally Posted by leadbelly View Post
Beware that the cross coupled outputs are only conditionally stable. There have been bad experiences in the PA world of the cross coupled specialty chips being unstable driving long cables, albeit some chips are better than others.

Hence why I said that for long cables the THAT1646 has a lot going for it. For domestic use I don't see a problem. But worth pointing out that pros have their own problems, sometimes big ones .


Quote:
Originally Posted by rsdio View Post
Thanks for that link. Quoting from page 8, "Unless there are pressing reasons to build an electronically floated output I shouldn’t bother."

There are certainly many cases where the reason is pressing, but not when you can control what device is connected to the output.
Bruno has a nice way with words. Of course in your case the pressing need might be that you cannot drive your ADC to 0dBFS without a differential drive.
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Old 22nd January 2019, 05:56 AM   #13
PRR is offline PRR  United States
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Originally Posted by rsdio View Post
......would be thwarted if ......
You can build all four of your plans, twice for stereo, for about ten bucks. 2% resistors are cheap by the dozen.

Do that, using '5532 and ~~2K, AND direct unbalanced connection to balanced input. Use normal program sources. See if any sound "thwarted".
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Old 22nd January 2019, 06:08 AM   #14
rsdio is offline rsdio  United States
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Originally Posted by PRR View Post
You can build all four of your plans, twice for stereo, for about ten bucks. 2% resistors are cheap by the dozen.

Do that, using '5532 and ~~2K, AND direct unbalanced connection to balanced input. Use normal program sources. See if any sound "thwarted".
Good point. I still don't own an AP, but I could certainly build all of these and borrow one.
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