The issue is that even poor measuring DACs still have barely audible distortion or whathaveyou, unless it’s a total garbage product.
It also has been shown that ~10sec is the limit for when one can accurately compare the sound of one instance to another (with precise detail), so any reviewer talking about another product they reviewed 6 months ago should not and cannot be held as valid.
Also, sighted listening that’s likely not level matched should also be taken with a grain of salt. If I go to an audio show and show two DACs, one a cream of the crop $10,000 one with a beautiful exterior, and the other being the same product but in a cheap plastic casing, I bet 99% of the attending audience will pick the former as sounding better.
It also has been shown that ~10sec is the limit for when one can accurately compare the sound of one instance to another (with precise detail), so any reviewer talking about another product they reviewed 6 months ago should not and cannot be held as valid.
Also, sighted listening that’s likely not level matched should also be taken with a grain of salt. If I go to an audio show and show two DACs, one a cream of the crop $10,000 one with a beautiful exterior, and the other being the same product but in a cheap plastic casing, I bet 99% of the attending audience will pick the former as sounding better.