(18-May-2015, 12:13)G51 Wrote: Hello, Saint0. Jeff Fritz, Editor of Soundstage.com, once evaluated the expert line (of course not V8.0.0) and said it was dead silent even in his sound-treated listening room. So what comes the problem of the low frequency heart-beat-like rumble and the sudden outburst of very loud noise we heard? Electrical interference from our home electricity network? The later firmware? Or any other factors? Saint0 did you plug the Expert line direct to wall socket or use a power conditioner?
(18-May-2015, 11:13)Vivialet Wrote: I can also hear the beating noise, but only while changing the volume. If I don't move the volume wheel then it is silent. It seems as if the DSP is creating this noise while changing the volume. Not really a problem for me as I would be deaf if I listen with more than 0 db...
I've tried to reproduce this but my 250 remains dead silent all the way up to +30dB, only the faintest hiss from the tweeter can be heard when I lay my ear on it. I have to say that I have disabled everything I don't use, only the USB input, one optical and one stereo pair of analog inputs is enabled (and a stereo pair is used as pre-outs to my subwoofer). So no SAM, no ethernet, WiFi and all the other inputs.
My 250 is fed by a PS Audio P3 power plant.
PS Audio P3, Shunyata ΞTRON Alpha Digital and HC/Furutech power cables, Paul Hynes SR7EHD-MR4, DIY Roon Server & Roon Endpoint running AudioLinux Headless, Phasure Lush^2 USB cable, Audioquest Diamond RJ/E ethernet, Uptone Audio etherREGEN, Mutec MC-3+ USB, Shunyata ΞTRON Anaconda Digital XLR AES/EBU, Devialet Expert 250 Pro CI, Nordost Tyr Reference LS cables, Von Schweikert VR-5 SE Anniversary Edition, Anti-Mode Dual Core 2.0, JL Audio Fathom F112. More detail here.
The Netherlands
The Netherlands