Hiss / buzz , how to get rid of?

[Greg]

A shorted input should be silent (or very close to silent). Any noise on a shorted input indicates a fault of some kind. I don't use the phono input myself, but I've followed the 'noise threads' for some time. It seems that some have a noisy phono input and some don't. If that is the case there is a variable in production that Devialet has to fix

I’ve tried shorted RCA plugs on phonostage input. No difference. The stage has the same amount of hiss as with the phono leads from the arm connected. My speakers are 4 metres from my listening position. Hiss becomes audible at -23dB and increasing as the volume is turned up. This is on my D250 Pro C/I. I had exactly the same issue with my previous D220 Pro C/I.