It's also for the coax output of the USB to spdif converter.View attachment 9447
So should we conclude that the USB out is very clean? The highest noise level at 40kHz is about 10microV. Referred to a 2V signal that is -106dB at 40kHz.
It's also for the coax output of the USB to spdif converter.View attachment 9447
So should we conclude that the USB out is very clean? The highest noise level at 40kHz is about 10microV. Referred to a 2V signal that is -106dB at 40kHz.
No idea but I'll check it out.@onlyoneme: I wonder if the digital ports noise improves further when the analog (line and phono) inputs are shorted with short circuit plugs.
What do you mean?It's also for the coax output of the USB to spdif converter.
That it is not the USB output.What do you mean?
OK, my bad. Those latest tests are for te coax output. And it appears that the Ultra coax is noisier than the Pro...That it is not the USB output.
Nope, look at the overall rms level in the top right corner. It's polluted with the spikes, but not noisier in the measured frequency span.OK, my bad. Those latest tests are for te coax output. And it appears that the Ultra coax is noisier than the Pro...
Right. The Ultra supply strangely seems to be less filtered as the higher order ripple harmonics are higher. Any simple way to add a large capacitor to tame those?Nope, look at the overall rms level in the top right corner. It's polluted with the spikes, but it not noisier in the measured frequency span.
A new content added.
Remember that a high or low SINAD on the electrical spdif output might not , in any way, change the sound quality . It depends on the dac .Right. The Ultra supply strangely seems to be less filtered as the higher order ripple harmonics are higher. Any simple way to add a large capacitor to tame those?
That supply should affect the USB out equally. I suspect/hope though that a DAC with a well filtered USB input will tame the ripple.
There is a problem if the inbuilt smps contaminates the AC grid with pollution . We dont know that for sure . If thats the case, WiiM cant sell the streamer in europe with all the EMI regulations . So I dont believe the issue is big .are you serious...?
you don't understand that it's just a real power supply problem which dirties everything and degrades performances (besides the data does not correspond to those announced by wiim)..
particularly on the analog output..
remains to be seen on the analog inputs and more still on the phono (minimum +40db) etc.
design or execution?
(more probably execution like "amp")
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True.What’s happening to the power supply only matters if it raises the noise level or increases distortion.
You do not listen to a power supply. You listen to what comes out of those RCAs.
As.mentioned earlier it needs to meet EMC regulations to be sold in Europe.True.
Might be a problem though if the noise from the switchers gets back to the main AC grid, pollution amplifiers and such .
Whe dont know if this is the case .
Maybe onlyoneme can test this ?
Is this the reason for selling delay ?As.mentioned earlier it needs to meet EMC regulations to be sold in Europe.
I believe companies can either get a test house to carry out the tests or do them in house and self certify. We don't know which route was chosen by WiiM.Is this the reason for selling delay ?
Is an lfd similar to an lpf?clearly you are not equipped to understand and only wave ideas that are a little simplistic... always practice this kind of shortcut... wonder why a sinad is -110.7 when announced at -115 -116 celon the sources, by wiim (value consistent with dacs of the same type chip) and which becomes consistent with the use by onlyoneme of an lfd... (which is of course totally anormal).... the ostrich policy