Fair enough, my apologies! Specifications are wonky and you did not commit to them. OP is delinquent and his whole thread idea may have been a honey trap.
I do not frequent ASR but AMIR has measured Chinese gear and his take on inaudible specifications is that once measured distortion and noise fall below the threshold of human hearing, the gear is "transparent".
ASR/AMIR have also exposed legitimate, audible specs and flaws on certain models, such as high output impedance, channel imbalances, or lack of proper safety protections.
In addition, ASR frequently discusses how some Chinese manufacturers engage in a "SINAD race", prioritizing numbers that look excellent on a graph but provide no audible benefit over slightly less optimized, name-brand equipment.
Since the OP is not participating, he probably already knew about such vagaries when he began this thread. Maybe he was just looking for clarification, but it seems as if he has zero interest in addressing our answers to his question.

