I have neither.Well, no wife, only kitchen
Test WIIM pro+ with different power supplies
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steadyshot
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AES E-Library » Physical and Perceptual Considerations for High-resolution Audio
It has been advocated that high-resolution audio means ultra-wide frequency range and that, given the limited sensitivity of human hearing for high frequencies, little is gained from high-resolution perceptually. Not much laboratory evidence is found to counter this assertion because...
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This paper would seem to put the proverbial 'cat amoung the pigeons'AES E-Library » Physical and Perceptual Considerations for High-resolution Audio
It has been advocated that high-resolution audio means ultra-wide frequency range and that, given the limited sensitivity of human hearing for high frequencies, little is gained from high-resolution perceptually. Not much laboratory evidence is found to counter this assertion because...www.aes.org
Vangelo51
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I have not paid to read the whole paper, but if the gist of it is that there is a lot more to hearing than measurements, I would agree......This paper would seem to put the proverbial 'cat amoung the pigeons'
I would also add some of us have more highly developed Temporal Domains than others. I have a hifi buddy who is autistic. He often comes up to listen to my system and I would challenge him if he can hear any changes I have done since the last visit. He can always point them out...sometimes he likes them, sometimes he doesn't, but he can always remember what the system sounded like before I made the changes. Like some people have a 'photographic' memory, he has an 'audiographic' memory and is certainly gifted in the temporal domain department!
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Hi , I have done extended listening comparisons with a Linn Klimax DS/0 renew and a WiiM pro, using different power supplies for the WiiM .Next week a LPS (Linear Power Supply) should arrive for the Wiim Pro, which I am using as a streamer only, connected to a separate DAC. I will let you know if I hear an improvement in sound quality. I hope so, but proof is in the.
Linn Klimax DS renew vs WiiM pro + Rega dac R - sound quality comparison
Recently I had the opportunity to have a Linn klimax DS renew in my listening room for some days, doing extended listening comparisons with a Rega dac R and a WiiM pro as a digital drive. This gave very interesting results using TIDAL . After testing the WiiM pro as a digital transport for...
pinkfishmedia.net
Looking forward to that reviewNext week a LPS (Linear Power Supply) should arrive for the Wiim Pro, which I am using as a streamer only, connected to a separate DAC. I will let you know if I hear an improvement in sound quality. I hope so, but proof is in the
If really bad , It can put back lots of switching noise back on the grid , making other components such as amplifiers sounding possible worse . This fact is often neglected . Linear power supplies also pollute the grid somewhat.I don't think that proves the difference in sound quality between a "cleaner lower-cost PSU" and a "more expensive and more cleaner PSU".
It is conceivable that a power supply of extremely poor quality, such as the USB of a PC, may degrade the sound quality.
( Edit: one of the worst offenders with inbuilt switched power supply is Apple TV v.3 . Its pollution is so big that it makes analog tv picture look bad if its on the same powerblock . Noone watches analog tv nowadays ofcourse, but its interesting )
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Rudivanb
Active member
Interesting read, In this test an Apple iPad USB charger turned out to provide clean power with very low spikes, noise and ripple, with very good current stability. I don't have an iPad charger to compare it with my upcoming LPS from Audiophonics. Your experiment shows that a good power supply can make a difference in sound quality, even when bits are bits, there is more to it.
My iPad charger 5V , 2A from 2012 has been tested already , here:
iPad charger teardown: inside Apple's charger and a risky phony
This article is now available in Turkish iPad Åarjının iç yapısı and Chinese [ä¸æç¿»è¯çæ¬] Apple iPadåè£åçµå¨æ解 . Apple sells their iPad charger...
…its just slightly better than the stock supply for the WiiM if measured on the DC side ( onlyoneme has tested the stock supply ) . However , I have no clue about the switching frequency of the iPad charger , if its something that is for the better with the WiiM pro, or the amount of pollution the stock supply puts out back to the grid .
The battery powerbank didnt sound best, there was no difference compared to the stock power supply . This was a surprise for me. Again - the powerbank have switchers on the output and the ripple may be worse than the stock supply .
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steadyshot
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iPad charger is 12 v the drawback of iPhone charger is ripple . To me ifi power x is a nice upgrade
No , this iPad charger from 2012 has only 5 v 2A . Not 12 V as the newer ones.
I havent tested ifi power x .
Yesterday I have bought a lm317 power supply board with a separate 9V 3A linear AC transformer to try with the WiiM pro. I will compare it to the iPad 2012 charger. 13 euro for the lm317 board so no big investment. Delivery from audiophonics before christmas.Next week a LPS (Linear Power Supply) should arrive for the Wiim Pro, which I am using as a streamer only, connected to a separate DAC. I will let you know if I hear an improvement in sound quality. I hope so, but proof is in the
Looking forward to your impression of your LPS.
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Rudivanb
Active member
Is 9V okay for the Wiim, as it accepts 5V ?
The linear transformer output is 9V AC . This cant be used with the WiiM. It would destroy the unit.
What you see on the picture is the regulation board, not the AC transformer.
WiiM pro needs 5V DC . The lm317 board converts 9V AC to a pure 5V DC at its output.
( You can change the DC output anywhere from between 1.5V to 7V with lm317 with the trim-pot, when using my 9V AC transformer )
One needs a simple voltmeter measurement instrument to do this.
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Very much looking forward to your results. The more reasonable cost methods that are tested the better chance of finding the best balance of improving the outcome at a cost most can afford. For those with deeper pockets or just have no limits if they find something that makes them happy so be it. Once past a certain threshold there my be gains but the cost increase is exponential, I have experience in that realm, wish I still had some of that money not so well used. Now I stay where I have most of my life, getting the best results for the lowest cost, actually a more rewarding result.
The biggest sum I will spend on this is for the iFi ipowerx I received which I can at least take a listen to today as well as an Ankor 5 volt battery. Before of after I try a new internet switch(bought used) going from Motorola 2180 that I only use the Ethernet ports on to a Cysco Catalyst 2960G I received yesterday in mint shape bought on Ebay for $59, supposed to be a very clean switch. Speaker(amp, DSP, etc included as active unit) for now is a very fine Martin Logan Vision X sound bar (bought used several years ago for $225, a steal of a deal) which unfortunately has an issue that just started up I am working on with the line level inputs so have to use optical or coax.
I would spend the day outside working on our all out full time RV remodel but most of the day just to darn cold so I can play indoors a bit, only 17 our right now.
The biggest sum I will spend on this is for the iFi ipowerx I received which I can at least take a listen to today as well as an Ankor 5 volt battery. Before of after I try a new internet switch(bought used) going from Motorola 2180 that I only use the Ethernet ports on to a Cysco Catalyst 2960G I received yesterday in mint shape bought on Ebay for $59, supposed to be a very clean switch. Speaker(amp, DSP, etc included as active unit) for now is a very fine Martin Logan Vision X sound bar (bought used several years ago for $225, a steal of a deal) which unfortunately has an issue that just started up I am working on with the line level inputs so have to use optical or coax.
I would spend the day outside working on our all out full time RV remodel but most of the day just to darn cold so I can play indoors a bit, only 17 our right now.
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Update: I just ordered a used iPad charger on *bay for $6.49 shipped from a very reliable seller, it had a clear picture showing details so I know it is an original apply 5 volt charger.
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I would like to include an OEM Apple iPad 5 volt charger, found some used ones on Ebay and likely real Apple since being sold as used and under $10 shipped but I will look into buying a new one direct from Apple if still just $19. That way I can listen to the WiiM original charger, even try an original Samsung one, the battery bank, iFi iPowerX, and the Apple unit.
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I would like to include an OEM Apple iPad 5 volt charger, found some used ones on Ebay and likely real Apple since being sold as used and under $10 shipped but I will look into buying a new one direct from Apple if still just $19. That way I can listen to the WiiM original charger, even try an original Samsung one, the battery bank, iFi iPowerX, and the Apple unit.
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Yes, I agree, great fun and not a ton of money, even better
I will be using an outboard DAC once I get a problem fixed on my temp system and certainly on our higher end system once I get it up and running but not ready to install it yet, still remodeling. For now testing the digital out only as that part of my system is working fine(Martin Logan Vision X soundbar, dang fine unit, listed for around $1700, bought it used for $225) I picked the Pro Plus though going to use an outboard DAC (Topping E70 Velvet) I wanted to take a listen to it with the analog outputs and I got it on sale for $175.
I will be using an outboard DAC once I get a problem fixed on my temp system and certainly on our higher end system once I get it up and running but not ready to install it yet, still remodeling. For now testing the digital out only as that part of my system is working fine(Martin Logan Vision X soundbar, dang fine unit, listed for around $1700, bought it used for $225) I picked the Pro Plus though going to use an outboard DAC (Topping E70 Velvet) I wanted to take a listen to it with the analog outputs and I got it on sale for $175.
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