Nothing new about some swapping components for an a somewhat different presentation. The most common is for valve based amplification where different valves (tube rolling) from the standard offering can changed to alter presentation.What I find a bit more concerning is that there is a following for the Kinki which suggest swapping OP amps for better (less bright) sound, as on YouTube.
In the latest review of the EX-M1+ the reviewer also mentions 'op-amp rolling' which he says he'll try and report back. Nevertheless he is still so impressed with the EX-M1+ in it's standard form that he decides to keep the EX-M1+
There was a time … not too many years ago, when Chinese-made hi-fi components were kind of looked down upon by Western audiophiles. Luckily, those days are going away fast as the Chinese have come on in leaps and bounds lately with cutting edge yet affordable components from digital-to-analog con...
Btw, so far in my experience I agree with Kinki Studio Audio in that "neutrality and musicality were the goals to achieve. Rich tonal quality, vivid sound imaging, details, high resolution and dynamic. The choice of the components, design, and tuning does just that."