HPF for REDD 47 project

[BOB42]

Good morning all
HPF for REDD 47 project.
attached two sketches
I would like to know if the two diagrams are correct?
does the difference affect the sound?
what would be the right choice?
thank you
BOB

 

[ruffrecords]

The second one is definitely wrong.

Edit: the first one is also wrong. Pin 1 of the input XLR does not go to gnd. It goes to chassis.

Cheers

Ian

 

[BOB42]

thank you very much Ian
I would come back to the community for gnd routing.
BOB

 

[ruffrecords]

Balanced lines do not have a ground. The signal exists solely between the hot and cold pins. The third pin is usually connected to the screen of the cable which is there to act solely as a shield for the two signal carrying conductors. The shield captures interference and the idea is to route it away from the analog 0V by connecting it to the chassis which is generally connected to the mains safety earth. One thing you do not want is interference traveling along the analogue 0V line and then to safety earth. In the days of transformer inputs and outputs this was never a problem but when semiconductor based 'electronically balanced' outputs appeared, these were referenced to analogue 0V and suddenly everyone thought XLR pin 1 should go to analogue 0V. So many manufacturers made this mistake it became known as the pin 1 problem.

Pin 1 Problem

Cheers

Ian

 

[BOB42]

Thank you Ian
BOB