dangermouse
Valued Contributor
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- Jul 25, 2023
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- 392
Expectation bias has a lot to answer for.
Test WIIM pro+ with different power supplies
- Thread starter D1N0
- Start date
Expectation bias has a lot to answer for.
Expectation bias - one of the strongest bias! Can only be avoided by (double) blind test!
MrA
Senior Contributor
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- Sep 16, 2024
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Topics like this are why I stopped getting involved in audio-eurika nonsense years ago. Everything is personal preference but black-white positions & placebo rage on endlessly on music forums. Yawn.
End
- In youth I believed pretty much everything the audio mags told me so spent more than I had.
- Older, I joined in audio-discussions and became confused, spending even more as I could now afford it.
- In middle age I developed deep cynicism, bought less & started packing my loft (attic) with the stuff I couldn't sell. The stuff I bought was becoming very expensive.
- In later middle age I discovered speaker time alignment & that it wasn't really the equipment but placement, the room & its acoustics that made a real difference. I completely STOPPED buying music mags and involvement in forums, realising that most of the equipment and snake-oil devices I owned made marginal difference but the system had become exactly what I had been searching for.
- Since ~2012 I have a fabulous sounding setup and just use it to listen to music - a close friend using nearly £500k of the latest Linn equipment still rates my system as more life-like & 'better' whatever that means.
End
Which one?
dangermouse
Valued Contributor
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- Jul 25, 2023
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Which one of what?
Of these jitter measurements in the context of audio stream sent over spdif.
hgo58
Major Contributor
Here are some references but do your own search.
Let's talk about the jitter over digital outputs. I will use the Holo Audio Spring 3 DAC which is a true NOS DAC and has an unique ability to turn off its PLL. This way I can compare a raw performance of the outputs in j-test.
Ultra, toslink:
Ultra, coaxial:
Pro, toslink:
Pro, coaxial:
Mini, toslink:
Non-WiiM device for a quick comparison, SMSL PO100 Pro, coaxial:
All WiiMs have similar random jitter level, which is reflected by the noise floor, but they differ a lot with the periodic jitter, which is...
Ultra, toslink:
Ultra, coaxial:
Pro, toslink:
Pro, coaxial:
Mini, toslink:
Non-WiiM device for a quick comparison, SMSL PO100 Pro, coaxial:
All WiiMs have similar random jitter level, which is reflected by the noise floor, but they differ a lot with the periodic jitter, which is...
WiiM Pro Plus - Review & Measurements (Streamer)
WiiM Pro Plus - Review & Measurements Hi Folks, Here is another review, measurements-based, today about the WiiM Pro Plus (or "Pro+"). While some rumors already mentioned it for the last couple of months, it is just launched today (August 8) officially. The WiiM Pro Plus comes with a $220...
www.audiosciencereview.com
WiiM Pro Plus Streamer Review
This is a review and detailed measurements of the WiiM Pro Plus streamer, DAC and preamplifier with Bluetooth support. It was sent to me by the company and costs US $219. While the case is plastic, it still "looks the part" as the Brits would say relative to other more famous brands of...
www.audiosciencereview.com
WiiM Pro Plus - Review & Measurements - Hifi Studio 79 - Hifi streamers, DAC’s & audio
WiiM Pro Plus - Review & Measurements nothing but a bargain alexa apple spotify qobuz roon hi res audio hifi internetradio bluetooth
www.hifistudio79.nl
Here are some references but do your own search.
Let's talk about the jitter over digital outputs. I will use the Holo Audio Spring 3 DAC which is a true NOS DAC and has an unique ability to turn off its PLL. This way I can compare a raw performance of the outputs in j-test.
Ultra, toslink:
Ultra, coaxial:
Pro, toslink:
Pro, coaxial:
Mini, toslink:
Non-WiiM device for a quick comparison, SMSL PO100 Pro, coaxial:
All WiiMs have similar random jitter level, which is reflected by the noise floor, but they differ a lot with the periodic jitter, which is...
WiiM Pro Plus - Review & Measurements (Streamer)
WiiM Pro Plus - Review & Measurements Hi Folks, Here is another review, measurements-based, today about the WiiM Pro Plus (or "Pro+"). While some rumors already mentioned it for the last couple of months, it is just launched today (August 8) officially. The WiiM Pro Plus comes with a $220...
WiiM Pro Plus Streamer Review
This is a review and detailed measurements of the WiiM Pro Plus streamer, DAC and preamplifier with Bluetooth support. It was sent to me by the company and costs US $219. While the case is plastic, it still "looks the part" as the Brits would say relative to other more famous brands of...
WiiM Pro Plus - Review & Measurements - Hifi Studio 79 - Hifi streamers, DAC’s & audio
WiiM Pro Plus - Review & Measurements nothing but a bargain alexa apple spotify qobuz roon hi res audio hifi internetradio bluetooth
You didn't provide a specific and precise example; instead, you bombarded me with generalities.
You probably can't provide such an example correctly.
Believe it or not, the graphs you cited are not the jitter measurements discussed here.
"The lack of understanding can lead to the creation of personal or simplified explanations to fill the gaps in knowledge."
Exactly.
Last edited:
BowsAndArrows
Trusted Contributor
Well, we've discussed A/B/x testing a few times in the forums... it's not as easy as people think to conduct such tests and to analyse the data without bias and confounding...
See the discussion here if you are interested... but that's basically why we recommend extended listening at home (or a familiar system). When trying to judge subtle differences in SQ caused by making a change...
See the discussion here if you are interested... but that's basically why we recommend extended listening at home (or a familiar system). When trying to judge subtle differences in SQ caused by making a change...
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