No idea but I'll check it out.
My Ultra tests
- Thread starter onlyoneme
- Start date
What do you mean?
Thanks for all the hard work again @onlyoneme
That it is not the USB output.
OK, my bad. Those latest tests are for te coax output. And it appears that the Ultra coax is noisier than the Pro...
Last edited:
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.
Last edited:
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.
Steve Woodhouse
Major Contributor
- Joined
- Aug 11, 2023
- Messages
- 1,490
What’s the overall measured SNR over coax?
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 .
Much more important than high sinad on the electrical outputs is probably if theres any SRC done , many ”high end streamers ” does this making the sound slightly different ( in reality = worse ) . Typically brighter with a false sence of greater clarity .
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")
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")
Last edited:
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")
What I know for sure is that SRC always worsening the sound, and that native bitperfect solutions always sounds more natural . Again, expensive streamers that mixes with the signal may give a false impression of greater clarity and detail. It will also sound slightly thinner and harder .
We are also talking digital bits here coming from the Ultras spdif . If the dac can read the bits and have sufficient isolation from noise the sound from the dac will be perfect .
Last edited:
Steve Woodhouse
Major Contributor
- Joined
- Aug 11, 2023
- Messages
- 1,490
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.
You do not listen to a power supply. You listen to what comes out of those RCAs.
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 ?
it's not necessarily emi....and when we see what happened with the amp and the recalls... (and the security problem more for the amp...had been marketed in Europe too... . )
standards are declarative in the first place...
that just confirmation of what we can observe in ana output...( but not signigicatif at square signal in mhz)
standards are declarative in the first place...
that just confirmation of what we can observe in ana output...( but not signigicatif at square signal in mhz)
slartibartfast
Major Contributor
- Joined
- Apr 18, 2024
- Messages
- 2,373
As.mentioned earlier it needs to meet EMC regulations to be sold in Europe.
Is this the reason for selling delay ?
slartibartfast
Major Contributor
- Joined
- Apr 18, 2024
- Messages
- 2,373
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.
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
slartibartfast
Major Contributor
- Joined
- Apr 18, 2024
- Messages
- 2,373
Is an lfd similar to an lpf?
Brantome
Major Contributor
- Joined
- Oct 20, 2022
- Messages
- 6,842
Extremely unlikely I’d say and entirely speculative. This won’t be the first time (and probably not the last time) that I’ll say the rollout of the Ultra is following the pattern of previous WiiM models in that the USA gets the product first, maybe even with a small first batch followed by a larger one, with the UK/EU and the rest of the world’s availability at least month or more later.
