Lineair power supply

So what can I do with this knowledge relative to assessing or better quantifying equipment audible improvements? Can you measure distortion before and after while playing an audio track ? Reduction in distortion is captured accurately even in very small scales? Are you sure also that except distortion in 20hz - 20 kHz ,that distortion outside these boundaries does not have effects in sound impressions ?
 
Last edited:
You can do whatever you want, but I would suggest you become aware of the difference between the lowest level of distortion you can hear and the one that can be measured, such as -120 dBr. In a much wider frequency range than you could ever hear, btw.
 
And if you would like to compare your hearing abilities with the FFT assisted measurement, feel free:

1685647137869.png
 
I don’t want to compare anything . I just did a test quickly on my phone’s speaker to see what it is .

So someone should do a test with wiim mini playing a track with and without ifi ipower x and measure the distortion output in both cases….
 
The Mini is fully transparent over its toslink output with any of my bit-perfect capable devices regardless of the charger used. And within the measurement deviation error when ASRC is used. Even the ultra low noise Allo Nirvana does change nothing here.
Maybe there are DACs which can be affected by the charger used to power the Mini, but I do not own such low quality equipment.
 
onlyoneme said:
The Mini is fully transparent over its toslink output with any of my bit-perfect capable devices regardless of the charger used. And within the measurement deviation error when ASRC is used. Even the ultra low noise Allo Nirvana does change nothing here.
Maybe there are DACs which can be affected by the charger used to power the Mini, but I do not own such low quality equipment.
Click to expand...
It seems I own …
 
cc_rider said:
You’ll get facts and measurements based objective reviews on ASR.
Click to expand...
Not always, remember the deeply flawed review and measurements of the Sonore microRendu?

While there has been revisionist history applied there to cover up the original botch job, that review concluded the mR could not be recommended because it was not bitperfect, and caused an 8dB rise at the analog output of the USB connected DAC.

All of that was of course completely false/inaccurate, said a lot about the competency of the reviewer, and also revealed an obvious agenda/axe to grind, as well as a failure to listen to the mR at all, as an 8dB rise surely would be easily/clearly audible to the most casual observer.

Also false was Amir's assertion that the iFi iPower was the "included" power supply with the microRendu, when in fact it was just one of several options offered by Sonore, who sold that unit by default sans PSU. Once corrected on that misrepresentation, he then tried to call the iPower Sonore's "recommended" PSU, which was also false, then tried to shift the goalposts entirely by turning the whole embarrassing debacle thing into a scathing indictment of the iPower itself.

Wow was there egg all over Amir's face when it was determined his test setup was deeply flawed, including Windows Media Player (really?), with the dithered software volume control enabled. No thats not bitperfect, not through the microRendu nor any other network endpoint either.

Microsoft, Windows Media Player, buying then immediately retiring HDCD... not exactly the stuff of audio legends there.

How about the steadfast backing of that complete crock of BS known as Master Quality Adulterated? Almost caused a mutiny among the faithful over there, didn't it?

ASR = groupthink extraordinaire, which is too bad because there are various good/knowledgable people posting there.
 
Mike in NY said:
Not always, remember the deeply flawed review and measurements of the Sonore microRendu?

While there has been revisionist history applied there to cover up the original botch job, that review concluded the mR could not be recommended because it was not bitperfect, and caused an 8dB rise at the analog output of the USB connected DAC.

All of that was of course completely false/inaccurate, said a lot about the competency of the reviewer, and also revealed an obvious agenda/axe to grind, as well as a failure to listen to the mR at all, as an 8dB rise surely would be easily/clearly audible to the most casual observer.

Also false was Amir's assertion that the iFi iPower was the "included" power supply with the microRendu, when in fact it was just one of several options offered by Sonore, who sold that unit by default sans PSU. Once corrected on that misrepresentation, he then tried to call the iPower Sonore's "recommended" PSU, which was also false, then tried to shift the goalposts entirely by turning the whole embarrassing debacle thing into a scathing indictment of the iPower itself.

Wow was there egg all over Amir's face when it was determined his test setup was deeply flawed, including Windows Media Player (really?), with the dithered software volume control enabled. No thats not bitperfect, not through the microRendu nor any other network endpoint either.

Microsoft, Windows Media Player, buying then immediately retiring HDCD... not exactly the stuff of audio legends there.

How about the steadfast backing of that complete crock of BS known as Master Quality Adulterated? Almost caused a mutiny among the faithful over there, didn't it?

ASR = groupthink extraordinaire, which is too bad because there are various good/knowledgable people posting there.
Click to expand...
Nonsense
 
Well anyway . I don’t pretend to be an authority when my background is in finance and not in sound engineering/ electrical engineering. My guess is that cleaner current feeds the clock and the optical converter in optical out therefore jitter is reduced . I did back and forth with the Apple charger . I mean you don’t even have to try to hear the big difference
 
Last edited:
steadyshot said:
Well anyway . I don’t pretend to be an authority when my background is in finance and not in sound engineering/ electrical engineering. My guess is that cleaner current feeds the clock and the optical converter in optical out therefore jitter is reduced . I did back and forth with the Apple charger . I mean you don’t even have to try to hear the big difference
Click to expand...
if it is a story of jitter at the output of the mini which will be improved.. it is however easy to measure and check...
;-)
 
canard said:
if it is a story of jitter at the output of the mini which will be improved.. it is however easy to measure and check...
;-)
Click to expand...
Hasn’t this old canard (pun intended) been gone over before ad nauseum - jitter doesn’t really matter on the WiiM’s digital outputs and even if it did, it’s more than handled by any competent external DAC?
 
steadyshot said:
Well anyway . I don’t pretend to be an authority when my background is in finance and not in sound engineering/ electrical engineering. My guess is that cleaner current feeds the clock and the optical converter in optical out therefore jitter is reduced . I did back and forth with the Apple charger . I mean you don’t even have to try to hear the big difference
Click to expand...
At least 4 cases for different chargers scenarios:
- charger affects the Mini and the result can be shown directly on the analog output for example
- charger affects the Mini and the result can be shown on the toslink output but measured through the receiver - so receiver's abilities to handle the incoming signal matters, like jitter suppression
- charger affects any other device in the audio chain through the Mini output
- charger affects any other device in the audio chain indirectly

Fourth case is unrelated to the Mini but it's related to the presence of low quality / outdated / vintage devices.
Third one can happen for the analog output when some issues like ground loop exist in the chain.
For the first case I've noticed a measurably significant difference only when the Mini was in idle state. No difference or insignificant one when it was playing anything.
Second case has been mentioned by me previously.
 
Last edited:
You must log in or register to reply here.

Similar threads

QuarryHunslet
WiiM Mini Power Adapter
Replies
14
Views
1K
slartibartfast
S
AudioPervert
Power supply
Replies
15
Views
668
Zap Rekowski
Zap Rekowski
C
Interference issue with Mini causing audio to cut in and out.
Replies
0
Views
143
conn
C
RoyalScam
WiiM Pro power supply vs WiiM Mini
Replies
5
Views
562
viktor
V
J
I WANT a Network Bridge STREAMER!
2
Replies
31
Views
2K
Justrucking
J
Back
Top