Ok, guys it seems I've found the reason for always worse Amir's tests for unbalanced DACs and better for balanced. The problem is Amir uses unbalanced APx555 inputs for unbalanced DACs. Only balanced inputs of APx555 have good enough CMRR to measure DACs or amps whatever, and actually, no reason at all to use unbalanced inputs ever(just forget about them) - only balanced XLRs.
Dear amirm, Unbalanced BNC inputs tied to the APx555 chassis and could not be used for non-isolated sources like AC-line powered PC, if you like to use that BNCs for any unknown reason(because any even 30 years old AP has excellent balanced XLRs), please use it with battery-powered sources. Balanced XLRs inputs are referenced to each other but not to the chassis intentionally to let you measure precisely sources with strong common-mode noise(XLR+/XLR-/GND-chassis-AP to GND of your PC, for instance, to USB-C shield). I can't and I don't push you to remeasure my DAC but for the future of the audio
SCIENCEreview.com better if you'll correct your setup.
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