RS250 noise from rca out

Hi - i have a noise/burnishing problem on my new unit. It does not make the noise on the usb audio out to my hi end dac-amp, but it does on the analog rca output (the golds output on the right). The amplify when turning the volume knob. Any recommendations to attenuate the noise? Thank you.

@Camek

We apologize for any inconvenience caused during use.
I have a few questions for you.

  1. Does the same happen after removing all cables except power and RCA cables?
  2. Did you connect RS250 and Amp ground?
  3. Has it happened since purchase? How long after use did it occur?

Thank you

Hi - yes i grounded it, no change. It did it since purchased. I also tried to put each components far away and analog only. I disabled in the menu bluetooth and wifi to use wired.

Thanks.