Amir has a combination of good and bad features. On one side he is an amateur, completely ignorant of a proper setting up measuring equipment (an example is a TotalDAC Six test and many other), on the other side is an extremely hard working and ambitious person. Combination of both is.... mischieve.
Previously in the R2R-11 test, it was a strong ground loops caused by a 50Hz power generator (the same as on the TotalDAC Six test) that caused R2R-11 to reset periodically every 20 second. And he proceeded with tests, it is not right. This last example is an evident case of collecting defective equipment from all over US. Not my comment, it was already pointed out on his forum. He never tested Audio GD equipment sourced directly from the factory like it is done with Topping or SMSL, only the equipment that happened to fail after a time.