All of my RPis are PoE powered. It makes for neater cabling and reduces the use of power adapters and mains sockets.
There’s no reason not to power a RPi endpoint via PoE.
My main rig’s RPi is PoE powered. I can turn the volume up to max (380 W/ch amplification) with nothing playing and if I press my ear against the tweeters, there’s a faintly detectable hiss.
If I played music at this volume, I’d be deaf and my voicecoils would be molten metal…
Why not? My Pi4s are powered over ethernet.
So is my Merging Anubis Pro interface. All sounds fine 
See:
This sentence sums up the absurdity of the whole discussion.
If nothing is playing, your RPI does not send any sound to your DAC, so there’s no reason for you to hear any noise originating from the RBI.
The hiss you hear when you put your ear against the speaker comes from the electronic circuitry of your amplifier.
The electrical noise that we were talking about cannot be heard as a noise with your loudspeakers. It only degrades the performance of the analog conversion of your DAC. The result is that the sound of the music to which you listen has a lesser clarity, has less depth, a narrower sound stage, etc…
Have a nice day.
Thank you for reinforcing this point. My Devialet amplifiers also use switch mode power supplies and perform very well. You can check out the specs here: Audiophile amplifier EXPERT 440 PRO DUAL - Devialet
I think your assertation that “ Benchmark Media’s AHB2 power amplifier is the lowest noise and distortion audio amplifier on the planet, so they know a thing or two about the subject.” is a little wide of the mark. 
Edit: let me clarify. I’m not saying they don’t know a thing or two about the subject, just the first bit. 
I haven’t seen any 3rd party measurements showing any Devialet amps to have lower noise and distortion than the AHB2.
The AHB2 and some amps implementing Purifi modules properly, are state of the art these days.
You claim analogue noise enters the DAC from the network. Everything is still electrically connected in my example here, so noise from the network would still enter the DAC if it were there.
Yes, I agree, this discussion is absurd.
Devialet is known to have the least distortion etc of amps worldwide. They have a number of patents also as well as top reviews in the specialist press.
Analogue electrical sound enters to the DAC when you stream to it DATA, because the electrical noise enters to the DAC with the same electrical current as the DATA.
If you don’t stream data, there’s no entry of an electrical current, and it does not enter.
The DAC does not process the electrical noise, and does not convert it into an acoustical noise.
It only converts the digital data into an acoustical sound.
Nevertheless, the injection of electrical noise inside the DAC degrades the quality of the digital to analog conversion, and the sound of the music that you hear through your speakers is less good.
According to their own marketing department ? This is from Stereophile’s measurement of Expert 140 Pro:
Devialet don’t specify how they measured noise and distortion. They could be cheating and doing it @1kHz.
Benchmark Media specify theirs from 20Hz to 20kHz.
If you read the full review here, the AHB2 test results outperform the Devialet’s claimed numbers anyway:
No matter whether the AHB2 has lower noise and distortion than the Devialet, or vice versa. At this level we’re splitting hairs, or maybe rather, protein molecules…
No one could listen to one or the other and claim that either has better or worse noise or distortion. The levels are so far below audibility as to be irrelevant.
No one here was talking about audible differences between those two amps! It was merely as already mentioned the assumption „ Benchmark Media’s AHB2 power amplifier is the lowest noise and distortion audio amplifier on the planet, so they know a thing or two about the subject.“ which is just not the case.
Thread contributors clearly demonstrate their lack of understanding, whenever they feel the need to add RFI when having mentioned EMI.
Hint:
RFI (Radio Frequency Interference) is just a small spectral section of EMI (Electro Magnetic Interference).
I could easily go on and on, but I’m tired of it …
Now, on to my contribution to the OP:
Without the need for any audiophile paraphernalia or magic devices anywhere in the household, my DIY-speakers (97dB@2.83V/m efficient) are completely silent with ears to the drivers, when driven by my Hypex DIY-amps (2x200W@8Ohm) at full volume via balanced cables from a lowly SMSL M300MKII DAC fed by USB and Intona Isolator from the Roon core while playing a digital-zero test file - no audible noise, even in the quietest of the nights.
Everyone touting about all the steps needed to clean your signal path to reach your audio nirvana, please start by putting a shorting plug on the input of your amps and lay ears on your drivers.
If you hear even the faintest hiss, fix that problem first, then work your way back through the chain until you reach your network gear and tell us about your findings, step by step.
Anything else proves that you’re just producing noise on the internet…
Where is the 3rd party measurement showing Devialet to be the lowest noise and distortion ? Or even showing performance meets their marketing ?
A-a-a-a-men…
There was a good reason to mention them separately.
There’s the noise that is induced passively to the Ethernet cables by their simple exposure to radio emissions of all kinds (WIFI, Cellar, etc…)
And there’s the noise that is spread actively by the emissions of all the noisy devices that are connected to the cables of the LAN. (Modem, router, computers, TV decoder, switches, network printer, etc…)
Well there are many - just the first I found https://stereo-magazine.com/archive/articles?tx_archive_pi1[action]=download&tx_archive_pi1[article]=70043&tx_archive_pi1[controller]=Archive&cHash=b944ac7b3b8ede725ef1bf481e928726
After the thread has been flooded 
Maybe the time as come, to go back to the original questions
Or is it to late
THX
Have a nice WE
Torben
Do those specs meet their marketing?
It is very good but is this noise floor as low as AHB2? 
