Ah... the cat is out of the bag...
The ones for lighting don't need to have proper regulation, just need to supply some DC-ish voltage..
These switchters are very cheap and usually only have to meet emission specifications (if they actually comply to them or are tested for this).
When one decides to use it for audio proper operation cannot be guaranteed because these ones are not designed to power such devices.
I am willing to bet such power supplies will never be included with anything but lighting.
I have never heard about power supplies for lights not having to have proper regulation?
ikea has to follow regulations proper regulations Ikea is a gigantic company originating from Europe i live in Sweden myself and they have to follow very very strict regulations this is not just some low brand walwart from a company nobody on earth have heard off placed somewhere in china
Proper operation ? not designed to power such devices? most dacs use the same amount of power as a single lamp one watt so what are we talking about here?
i thought the point was that cleaner power wont change the way a dac or a headphone amp sounds? not in a way a human being can hear?
So why would a company have to use specific audio grade power supplies?
In fact several dacs that i owned that are psu powerd have come with power supplies that i already own! they came with hardrives or usb hubs and are identical to the ones that came with said dac.. dacs
im sure for most dacs that are powerd from the wall they are just generic walwarts that they got from somewhere multi purpose walwarts
i doubt they are audio specific power supplies i doubt there is a big business making audio grade wall warts i only know of one that make a switching walwart psu fed from the wall that talks about having great silent performance and that is ifi audio