Second thing - your graphs can be used for YOUR Melokin DAC ONLY, they can not be true for my Melokin. The reason is simple - I don’t use either USB input or standard Amanero convertor, I use an advanced version of the convertor (if necessary) and SPDIF input (usually). There is another reason - 0 dB FS measurements can not be approximated to other similar devices, period. Why? I will tell you a bit later.
Yet there are devices that fair well with 0 dbFS, and cost less. This is an argument against the Marantz, regardless of "how fair" it is, especially if a device can perform in a more demanding test like 0dbFS.
Your problem is, you don't actually have a point to make from the pragmatic sense(which is why so many posts are asking you what exactly is the point you're trying to make with some replies where you take some sentences out of context, and decide to speak about other portions of an argument/topic). This thing, at this cost with respect to performance is a total bust. No one actually cares how much better it may fair if the test was shifted slightly. The sort of testing amirm is doing should be the sort of benchmark manufactureres should be putting their gear through ESPECIALLY at these prices. And as I mentioned prior, if other devices at FAR lower cost can plow through this device with a more rigorous test, how exactly do you remotely come close to defending a product especially when cost is a night and day difference?
What you say has truth (from the other posts I read), the problem is, this is a difference in philosophy on how something ought to be operated. Tests here demonstrate operation to their max output for example, so there be no stone left unturned with respect to that.
But your biggest blunder (a pretty sad one at that) is you instantly nullify any of the decent and reasonable claims you've made by going off and making literally idiotic statements like: (I abreviate) "I'll trust golden ears instead, no thanks to this". This has ZERO weight here, especially if you're trying to "listen past" the obvious measurable flaws. I cannot stress enough how this last point I am making is the absolute death of goodwill from others when you make these blatantly faith-based machinations into something one ought to deem relevant or valid in the slightest.
Golden Ears lol.. in people past their teens.. what a ridiculous statement in priciple and totality. The only definition of golden ears I accept from people past the early teenage years is folks with years of training. Only then would I accept their claims of general "this sounds good" or "this sounds bad" statements.