This and other small Hakeleien in the operation of the device would still have been bearable, because the sound is top - but:
I had him return, because, unfortunately, he seems to have a Potentialuntschied compared to my other hi-fi components, which is indeed normal, but expressed in this case by distortions in the audio signal in the analog chain and can be heard on the headphone amplifier.
Have several hours component replacement and pre-listening then einfeutig the PD 30 can make a troublemaker, because with my Marantz CD player, with the same cable to the same terminals, there were not these problems.
Attached were Pro-Ject switchbox, headbox, Phonobox, Pioneer VSX 1122nd