Raspberry pi 4b ultra low noise Power Supply

Hi, I’m looking for a better power supply than the Raspberry supplied offering.

Ideally ultra low noise linea, 3.5A+ and of course 5v. I know about the Allo Nirvana but it’s 2.85A SMBS is the minimum requirement of a 4b and therefore peak demand would need more for the 4/8GB versions.

There are many Chinese one’s on the market made by Breeze Audio and relabeled - I have one and it runs the pi3b OK but not a 4b - I suspect it’s 2.5A.

Hope someone can help.

Cheers, John

You don’t need 3.5A when running as streamer (you don’t even need 3A). The 2, 4, and 8GB version of Pi have the same peak draw requirements (3A). The 8GB has some rework of the board to allow the 8GB chip to draw more from the regulator.

My understanding is USB-C, at 5 volt, is limited to 3A so the Pi won’t pull beyond 3A. I often run my Pi streamers at 600mhz to reduce “noise” and never had an issue. This also lets me comfortably run them off batteries / power banks if I want.

Is there something you’re trying to do where you’ve calculated you need that much draw? Very interested to understand your use case.

Thanks for the response. The reason I’m asking is that I have a Breeze Audio linea power supply, which is stated to be 5v 3.5A. It runs a 3b not not a 4b. Of course it may not comply to that spec but there are so many on Amazon etc that I would have thought they are.

Perhaps I’ll just try the official Raspberry supply, which I think is 2.8A and see how it sounds (currently I’m using a generic wall wart)

Many thanks

Are you sure your usb-c adapter is good? Do you have a volt meter… although those are really tiny pins to very a usb-c plug.

Some of those Chinese supplies are quite saggy. The voltage changes, usually to a lower value’ under greater load. A simple adjustment is to tweak the supply so it delivers around 5.3 volts which should counter any sagging. The best deal though is to buy something that doesn’t sag. That means getting away from the Chinese clone builds but obviously this comes at a price.

Thanks Henry, agreed on the Chinese product. Can you name a few alternatives as I can’t find any :slight_smile:

some of my favourite LPS manufacturers, on the order:
Farad Super3
Keces
HDPlex

I use a Farad Super 3 at 19v to run a NUC. Some Farad users have moved on to Paul Hynes designs and claimed them to be an improvement. That isn’t me though. The Farad was second hand and relatively cheap. I’d like a 12v one but can’t bring myself to pay as much for the PSU as the device it will be powering. I have a HDPlex 200 watt box powering components of my headphone setup. I don’t consider it to be super quiet though. Just a well built device with solid performance. And I don’t know about the present models but mine tops out at two amps on the 5 volt outputs. That’s it for me, the total of my experience though I do have a couple of cheap Chinese boxes on order until such a time as suitable Farad units appear used.

The Allo Shanti PS works fine for me on a Pi 4.

1 Like

I use an iFi iPower with my RPi 4 and it works like a charm.

The RPi rating assumes it’s fully loaded ie it includes the current draw for all the peripherals you could possibly connect. In practise it will get by with a lot less. I can’t remember the specific numbers, but I wouldn’t get hung up - you can look them up. I’ve got an Allo Nirvana coming that I fully expect to use with an RPi 4 (connected to the Boss2 - Allo suggested the Nirvana).

As per Joost I already have an iFi iPower that works with an RPi4. Also a Shanti that does - maybe I should try its 1A feed to see how far that gets :-). Not sure the 500mA linear AudioQuest supplies I have will work tho! (they didn’t make it to market)

I was of the opinion the issue was boot up. That was the point where it would trip up if loaded with a HAT and/or had a significant load on USB.

Got myself one of these from Aliexpress. It was a skeptical purchase but it has been a great improvement for the money. Works perfectly with the 4B.

https://www.aliexpress.com/item/1005001858502040.html?spm=a2g0s.12269583.0.0.76c216d4CXjFlz