Basically , HE is saying audiosciencereview's measurement is a joke.. result of 81db snr is wrong and was measured using wrong methods.. , and k5pro is better than NX4 DSD..
and I agreed with him on this. ASR got paid from Topping, and all Topping products got super good measurement. I think that AMIRM guy gave wrong crap results for other products deliberately ..., all those graphs on that site could have been photoshopped too..
No, they are not saying Amirm measurements are a joke. Just that the procedure doesn't take in account the adjustable volume of LO of K5 Pro. Because of that, the results are worse than expected.
But there is no joke in Amirm's method. He has a standardized way to measure DAC's and AMPs of any shape and form and have results that can be compared directly.
Fiio 98dB measurement cannot be compared to 81dB from Amirm as both don't share the same setup. Neither is better or worse, both check different things. Fiio way seeks best performance of their product, Amirm seeks performance at a standardized procedure that can be used to compare products.
Amirm even confirmed that SINAD goes into +90dB when voltage output is lowered to 1V or so,
so Amirm is not lying, he is confirming Fiio method to pursuit best result possible.
Regarding Topping, it's nothing but a conspiracy theory. Some Topping products perform excellent like DX3 Pro or DX7 Pro, but others have major flaws like MX3 or NX1s, and others while good, are edged by competitors. It could also be that Topping is tuning their products to excel in Amirm methodology, but it doesn't mean the products are better overall, or that Amirm is getting paid by Topping...
And then, of course, the recommendation and choice of one product over another depends on a lot more factors, like price, features, availability, support, durability, build quality.... Just because DX3 Pro performs better than K5 Pro, doesn't mean it's a better product.
Amirm conclusion about K5 Pro is basically that
K5 Pro is a champion low budget and well built dac/amp solution, providing plenty of headphone power with excellent dynamics and without audible distortion.
If some nonsense internet drama blurs your view of the whole picture, it's you who has the problem.