Test WIIM pro+ with different power supplies
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Mr Ee
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Very good question. I believe some high end manufactures specifically use (high quality) SMPS in preference to LPS.
I'll have to get searching / reading again; been a while since I found / read that.
Brantome
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Yeah, Linn’s Utopik power supply/module which comes in at £1350 is SMPS.
Justrucking
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I use the LHY LPS, or Jay's Audio, same unit. They do make a difference, at least to my ear, and do not break the bank. I think the more sensitive your speakers are the more you will hear these SQ improvements. At least that is my experience with a pair of KLH Model 5's vs a pair of Zu Omen Dirty Weekends and their new DW6 Supremes. The difference on the Model 5's was negligible. The Zu's, immediate and noticeable. Just my experience, no measurements taken. Even the ifi power supply sold on Amazon made a positive SQ improvement, I think it is still around $79. I would recommend either, the LHY or ifi over the WiiM usb power supply.
D1N0
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The IFI iPower X performs well, it is 109, but they do pop up on the used market for less. It is at least as good or better than similarly priced linear supplies from Ali Express. Type isn't most important, build is. There just happen to be a gazillion of badly made smps's out there because they are cheaper, lighter en more efficient than linear solutions. Just not good for audio because noise isn't a factor in most applications so manufacturers couldn't care less.
A linear power supply also pollute the mains somewhat. And the magnetic field from the linear transformer can pollute nearby electronics.
A big 12 volt battery and a lm1084 regulator set at 8 volt followed by another linear regulator set at 5 volt is probably the best option, it will lower the batterys high output impedance . No pollution on the grid and the double regulation makes the ripple very low. Left is the noise from the regulator. I did try double regulation:
Test WIIM pro+ with different power supplies
Hifi should really be about what sounds nice to the system's owner. I have everything from old 70s amps to my wiim amp, I'm sure most of them measure terribly compared to $40,000 hifi stuff shown at the trade shows, however I like how they sound and isn't that what it's all about? Yeah. I’m...
forum.wiimhome.com
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Yes, Im not an expert but it cant deliver the current needed to drive a WiiM pro+. lm3042 is only spec at 0.2 A. You will need at least 1 A spec to be sure longtherm.
A lt1084 is better at delivering current and wont overheat with a proper heatsink.
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Its a good power supply but it dont have super low ripple at 20mV. Its better than the dynamik though.
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Apple USB supplies are very good. Pick one with USB-A out and 5W or so.
D1N0
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Those are made for quickly charging iPhones, not for Audio. Don't buy it from shady sellers because they will likely be fakes.
Have you ou tried one?
Please report your findings.
Would this be helpful
Post in thread 'Pro - Power Consumption' https://forum.wiimhome.com/threads/pro-power-consumption.1301/post-17625
Thanks! Yeah the Pro used very little current. A typical Apple 5V 1A power supply works perfectly.
Yes, but we don't know how much power it consumes during the firm update. I'd be happy if someone could measure these.
Shouldn’t be any more than streaming 192kHz/24bit. Certainly not more than 1A.
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