I know - don't feed the trolls. I can't resist a little of that, unfortunately.
Closed-minded willfully ignorant strictly by-the-book meter-reader engineer types believe that most of the differences obvious to audiophiles between cables, amplifiers, DACs, use of “tweak” accessories, etc. are hype and illusion. I learned otherwise a long time ago. I'm an audiophile and also an electronics engineer and programmer who respects and uses science within its sphere of applicability. Some people never get beyond worship of scientific measurements, supposedly the scientific method, which assumes that for anything to be real it has to be demonstrable in a lab experiment, and then replicated. So much the worse for these people - they're missing out on a whole world of perception and experience - of musical, intellectual and spiritual enjoyment.
These fanatical objectivists seemingly never learn, don't want to learn, a lot of things in audio. Presumably because of ego, fear and a lot of other psychological mechanisms.
What they simply won't recognize is that the ultimate subtlety and resolving power of human hearing perception is vastly beyond present (and any projected) instrumentation capability and acoustical/neurological theory. All of the present and forseeable practical recording and reproduction technologies produce easily perceptible distortion, both in the amplitude (like harmonic and IM distortion) and the time domain. The hearing mechanism is especially sensitive to the time and frequency smearing types of distortion. The common effect of all these is a clearly perceived blurring, smearing, flattening and veiling of the sonic "picture", along with various tonal imbalances such as overbrightness and bass boominess or looseness.
Of course the ignorant obnoxious trolls will blow off these truths, but they need to be said. Just coming up - my use of the ignore feature of this forum.