USB high-speed isolators comparison tests

[Alou]

Most routers supplies are switching type, not linear.

Off course, the linear power unit is a seperate unit i had for a phono preamp.
I am goint to try some stable wall warts that some routers provided.

 

[Alou]

Pity I can't find anything like this on eBay:

https://www.jameco.com/z/FE4823-050...all-Adapter-5V-1200mA-2-5mm-Plug_2289151.html

Are you sure ? These are not rare to find but you are looking for 110V i forgot.

 

[carlmart]

It costs a lot more money to design a good switching supply.

I don't think cheap ones are good for low level signal devices. But of course there might be exceptions.

 

[carlmart]

Are you sure ? These are not rare to find but you are looking for 110V i forgot.

I live in Brasil, not the USA.

Either it comes from China, with a cheap shipping expense, or you pay an expensive one from the USA.

 

[Alou]

Are you sure ? These are not rare to find.

do you use 110v or 220v ?

 

[carlmart]

do you use 110v or 220v ?

110v

 

[Alou]

there is also this but i think its a bit pricey and as with most of their products there is too much hype behind it and less function :

https://www.ebay.com/itm/iFi-AUDIO-...818738?hash=item2f1c649cf2:g:FwUAAOSwEJZdGh0O

A good 5V 1amp wall wart is enough i think.

 

[carlmart]

Very pricey, as most things from iFi.

 

[carlmart]

A good 5V 1amp wall wart is enough i think.

Defining "good" should be the question. I might listen to a few and see if there are any differences.

I might try to adapt one of the 12v supplies I have stored, adding a 5V regulator that fits inside.

 

[Alou]

Good means that if you can measure it it will give you stable output at the requirement current,in this case for the D10 is half amp
0,5A ,the max current a usb 2,0 port can give.A good phone charger (The one that came from the phone manufacturer ) will also work usually they are around 1A.

 

[solderdude]

I might listen to a few and see if there are any differences

Well... one can listen to a 5V power supply

 

[Alou]

How can you listen to a 5V power supply ?

Well you cant! Hypothetically if you have a USB noise from the MB supply might improve that but most modern MB todays
have regulators in their design build in ,specially if you have a brand name one(ASUS,MSI,GYGABYTE,Supermicro etc)

 

[Alou]

Here is a 5V 1A wall wart that has a stable output (Measured) it came with an older gigabit Ethernet hub (Cant remember the maker) this is more then enough for the "experiment" .

 

[solderdude]

That doesn't mean you can not listen to a power supply.
I mean... it won't sound nice for sure but you can definitely listen to a power supply using the circuit I described.
It can even be educational.

Of course what carlmart is saying is that he thinks a power supply might change the sound of a DAC... which of course it doesn't.
A power supply could introduce common mode currents that may become audible or be so crappy/defective that the connected device operates outside of its intended voltage range.

 

[carlmart]

When I said "listen" I didn't mean listening to the power supply, but to find out what may have changed.

 

[solderdude]

I understood, just thought I would give it a twist.

 

[carlmart]

In my experience, and a I have a good ear trained for a lifetime as audio engineer, even a resistor can affect things in a system which is transparent enough. In my line of work you could not imagine things, so you can repeat things over and over and always pinpoint things.

That is just training, anyone can do it.

So a power supply will certainly affect things. Please not the word: affect. That doesn't mean improve or worsen.

Sorry if I do not trust measurements very much when they do not show something you are clearly listening to. The ear is a very sensitive tool if you know how to do it.

I have a friend who makes very high quality speakers, so we are constantly making tests.

 

[solderdude]

uh huh.

 

[mkawa]

what?

 

[Veri]

what?

You just said measurements don't mean very much when they don't correlate to your listening experience.

On an audio science forum