Great sound...
-Comes from great speakers and/or speakers with subs
-Removing the influence of the room and room modes affecting the sound. Use room EQ to fix the room under 300-500hz.
-Beyond EQing the room, once you get to the level of most of these devices over 90+ SINAD they are going to be quite difficult to tell apart in the vast majority of situations.
-Please show any proof you have anyone can tell the difference between a properly implemented "Cheesy AKM Dac's" or any other in any reliable, tested way
-You are using product reviews on Marantz's site to prove or disprove it is a good sounding product? That has to be the least reliable way to determine such a thing
-I have used RoomPerfect. It is fine. I like the way it doesn't do much in the higher frequencies. Even better... a very good speaker not corrected above 500hz and the use of Dirac DLBC.
-Some Marantz products has a bit of high frequency roll off, some do not. For example the Marantz 8015 does not. Some is so slight and there is so little actually content above 15khz that I seriously doubt you could hear it in a controlled environment with actual content.
-The midrange dip is a function of Audyssey and not the hardware. You can turn it off via the mobile app or pc app.
-Purely subjective opinions on things like this make so little sense to me. Nothing wrong with anyone thinking whatever they want, just don't thing it will gain much traction (at least here). The AVM 70/90 thread on AVS has a ton of such opinions without any support other than "it sounds so good its incredible".
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