Does a DAC need a large/strong power supply?

I can only imagine the negative review ASR would publish for my WEISS 501. I bought this after trusting my ears 

@tuberist Send it to Amir and find out exactly how badly you got screwed with this DAC. You could’ve just bought a $99 Chinese reference DAC that measures perfectly. Also, don’t forget to dig into that storage bin to pull some basic audio cables that came with your vcr 30 years ago. They’re just as good as high end cables. All you gotta do is just peel that yellow video cable off the RCA L/R and your all set!

I'm sure ASR would be happy to measure your Weiss 501 and I doubt it would get a negative review. Weiss has been building for the production side for years and they use SOTA Delta Sigma chips. 

Even if you do a comparison between two DACs--one with a huge power supply and one without, how do you attribute any difference in sound, if there is any, to the power supplies when everything else is different?  The entire design and implementation matters. 

It really comes down to the ASR measurement-is-everything approach vs. subjective listening.  I can think of nothing better for showing how little measurement really tells one about a DAC than going to an Audio Note dealer and listening to something like a DAC 5 (or any of their lesser DACs).  The Audio Note DACs measure so poorly, deliver waveforms that are almost totally unrecognizable from sine waves, that they should not be able to produce any music at all.   Do the audition and tell me if that is what you hear.

@nonoise 

Astute observation!

I enjoy open discussion forums and the various opinions and points of view. Perspectives I do not agree with can nonetheless be stimulating and thought provoking. Needless to say I suppose is that we all have our limits. In my case I hold little regard for those who display a glaring disregard (Mocking) for the gift of hearing and concentrated listening. We are endowed with this very special and vital sense for a reason.

When measurements are revered and reliance on hearing is dismissed or sneered upon, something is vastly out of kilter.Audio components are sought for the single purpose of hearing them perform as intended, listening to recorded music. Why is this activity for some, downplayed and replaced with infatuation with numbers and instrument derived test results? How is this possibly of more value than using one’s own ears? Not scientific enough ?

Both have value and measurements have meaningful application. In my opinion the listening process to judge audio merit has far greater significance.

Charles