Amir, your equipment and tests are “too ancient” and missing novel micro-dynamics, transient, noise and more important performance metrics High volume manufacturing data is missing in your tests as well.
Too ancient? What is not too ancient if you don't mind listing?
For now, my AP has a noise floor that is low enough to produce signal to noise ratio as high as 130 dB:
*Best case* dynamic range of our hearing system is 115 dB (limited by max SPL and noise level of the auditory system). With 130 dB like above, we have ample headroom.
Transients are trivial to measure and I show them all the time to satisfy people even though they have so little meaning as far as fidelity.
As to "high volume manufacturing," that is not my job. It is manufacturer's job. BTW, such testing usually uses (an obsolete) audio analyzer with "go/no go." Precision is not required there although would be appreciated if it existed.
My job is to determine performance of an audio device. Not its reliability. No reviewer can give you that data. The fact that you think my equipment is "obsolete" to do that and that I am supposed to do such testing makes my head spin!