Dear alpha-zulu,
I just recommended to give it a try.
That does not mean, that there will be an audible impact.
And well, it is not necessary to emphasize that
- room acoustics
- loudspeakers and proper loudspeaker positioning
is of utmost importance.
Then comes the source (LP, CD, SACD, etc.), the amplificaton, cables, etc.
And quality power supplies are definitely no voodoo - just take a look what sort of HF-garbage cheap switching-mode power supplies can produce. And then compare to a solid analogue linear power supply!
Finally: Why do you think WIIM offers a simple WIIM Pro, the better WIIM Pro Plus and in future the WIIM Ultra?