LC1 wrote:I have been reading this thread with interest.
LC1 > High and greetings brother....
Hans Beekhuyzen (links below) has said he may (will?) be doing a comparison between a few different power supplies for the Raspberry Pi, soon. I do believe the iPower will be one of those compared. I could be wrong, but I am waiting (and holding off on buying a LPSU because of this reason). He has just two days ago completed a review of the Mamboberry HiFi DAC+ (http://www.collybia.com/mamboberry-hifi-dac) that has a LPSU built in...
Mamboberry HiFi DAC+
"Review: a HAT board for Raspberry Pi containing not only a DAC but also a linear power supply."
The Hans Beekhuyzen Project
The Hans Beekhuyzen Channel
https://www.youtube.com/channel/UCR4tuh ... PD0q17sPEA
Some light reading while you (we) wait... this will also give me time to re-read your post, and assess your questions (I'm very tired right now)...
Tracking down noise sources on a Raspberry Pi
"You want to improve the sound quality on your Raspberry? Go Wireless!"
http://www.crazy-audio.com/2013/10/trac ... pberry-pi/
Ifi iPower for the Raspberry streamer
"By generating a signal identical to the noise signal but in the exact opposite phase, it actively cancels all the incoming noise."
"I kept the iPower in my system for three months and went back and forth several times between the iFi and my home-brewed 5A/50W linear power supply without noticing any major differences. Actually without noticing any minor differences either. To be honest I cannot be even sure if there are audible differences between the two and this is probably the biggest compliment one can do to a switching mode power supply. Back when I first tested the linear power supply against the run of the mill SMPS I was using in the first days the difference in sound was noticeable so iFi has obviously performed some magic with the iPower. Highly recommended!"
https://parttimeaudiophile.com/2016/04/ ... -streamer/
Post from two years ago...
I2S via Raspberry Pi - HF/VHF noise
"Now I can confirm that Ethernet adds noise and it could be better to use Wifi dongle. After this tuning I've compared again the effect of linear power supply. It is better than switched PSU. Although this helped a lot, the Toslink is still better."
http://www.twistedpearaudio.com/forum/p ... #post20596
"Please can you elaborate? Are you saying that for best sound quality you should use a wireless usb connection rather than the Ethernet port on the Raspberry Pi?"
http://www.diyaudio.com/forums/digital- ... ost3750875
NOTE: But, and I DO mean this... if PeteB says grass is pink I do believe him. I re-read his posts more than I re-read my own, and that's saying something (because of my OCD). It's because he knows more than me, I am only good at bringing data together into one place, nothing more.