bridged/balanced LM3886 - would this work?

[mrjayviper]

a picture paints a thousand words so... Thanks in advance. 🙂

 

[PRR]

Check the XLR pinout. GND is not usually in the center (odd but true).

And.... a lot of XLRs in hi-fi and even in full pro audio are not push-pull. A lot are single-ended with "ground balance" or "ground sensing" or just plain unbalanced. Here that is a waste of a LM3886 and its heat.

 

[mrjayviper]

Check the XLR pinout. GND is not usually in the center (odd but true).

And.... a lot of XLRs in hi-fi and even in full pro audio are not push-pull. A lot are single-ended with "ground balance" or "ground sensing" or just plain unbalanced. Here that is a waste of a LM3886 and its heat.

I honestly did not know the actual pin-out of the XLR (the image is just an example to illustrate the question)

 

[mrjayviper]

Check the XLR pinout. GND is not usually in the center (odd but true).

And.... a lot of XLRs in hi-fi and even in full pro audio are not push-pull. A lot are single-ended with "ground balance" or "ground sensing" or just plain unbalanced. Here that is a waste of a LM3886 and its heat.

are you saying using a bridged lm3886 is not recommended?

 

[abraxalito]

No he's saying you shouldn't assume that the XLR carries two 180-degree out of phase signals on pins2 & 3.

 

[mrjayviper]

No he's saying you shouldn't assume that the XLR carries two 180-degree out of phase signals on pins2 & 3.

but if it is input is truly balanced, the circuit would work?

 

[abraxalito]

Yes, I can't see why not. But note that the circuit isn't complete, no power supply or muting components are shown.