1 Topic by analogcabin (edited by analogcabin 2020-01-06 21:08:36)

  • Registered: 2019-10-24
  • Posts: 11

Topic: UFX II XLR Out to RCA

Hi.

The manual explains that; "The electronic driver circuit of the XLR outputs does not operate servo-balanced! When connecting unbalanced equipment, make sure pin 3 of the XLR output is not connected. A
connection to ground will cause higher THD (distortion)!"

I understand that.... so in the past I've tied pin 3 to pin 1 on the F XLR as shown in example 6. Should I instead wire my XLR Pin 1 and 2 only to shield and hot as shown in example 4? Is it a matter of too much signal hitting my unbalanced (Adcom) amplifier? or is it harmful to the UFX in any way?

Thank you!!

https://i.ibb.co/vw6YXpS/XLR-RCA.jpg

2 Reply by MC

  • MC
  • MC
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  • From: Germany/Thailand
  • Registered: 2007-04-06
  • Posts: 25,440

Re: UFX II XLR Out to RCA

Examples 5 and 6 usually fail in real-world use due to the input side not seeing a real ground (they would work with a transformer-based output). Also having ground conections everywhere (via power outlets etc) pin 3 might still be connected to a (noisy) ground and thus be shorted. Therefore I can only recommend 4.

Regards
Matthias Carstens
RME

MC's Website

  • Registered: 2019-10-24
  • Posts: 11

Re: UFX II XLR Out to RCA

Thanks for the information.
I wired as per your recommendation.... Works great!

-Tschüss