Building Balanced XLR Cables

I am building XLR cables using 3 conductor + shield wire. Typically I would solder the shield to ground, 1 wire to hot, and 1 wire to cold. Should I connect the 3rd wire to the ground (shield), use the 3rd wire as the ground (not use the shield at all), or not use the 3rd wire at all? Thanks in advance.  

Showing 2 responses by b4icu


XLR cables should have two conductors and a shield. NOT 3!
Do not use the 3rd conductors for GND.
Use the shield.
Shield is significant to protect from EMI/RFI. use it as GND.
Two ground lines (3rd wire and shield) may cause a ground loop and add hum.
Not to say it is not the standard XLR.
XLR (Balanced line) is a long lasting standard, used in so many applications and configurations.
It works.
Why change?
Just because you purchased the wrong cable with a 3rd conductor?

Mr. auxinput

XLR should be by STD. No exceptions. Salt and pepper are from another recipe.
I used, built, tested and opened XLR cables. Many for the VOA (Voice of America) projects I was involved (including a winning bid for a station proposal. I wrote book No.4: Audio and time base sub system).
As a part of that rol, we had an Audio expert from the TV broadcast station in Jerusalem. None of your ideas was Kosher.
Powering a mic?
The XLR cables are not for mics. They are for interconnecting home audio equipment.
I would put more attention on the connectors and pick Nutric.
Swiss made, the best in the industry.
Adding a wire (except the shield) is never used in unbalanced (RCA) interconnects, because of the ground loop problem. Why to use it with XLR?