Gents, I understand Deckard71 may not be back to say something and I am not quoting him to make any point other than the following:
When people claim the differences, especially when they claimed "night and say", "just try it yourself and you will hear it", "even my wife, or 10 year old daughter" can hear and ask "Dad, what did you do..", are just what they think they hear. So there is no point asking questions like "okay we see the measurements, but how does it sound?, or to someone who posted I replaced my Marantz avr with Arcam, or Anthem etc., "Please tell us how it sounds?", or "which one sounds better"... etc. etc.. I don't mean people should not ask such questions, for information, fun, or simply sample other opinions, sure ask but I mean those who obviously are trying to make their own purchase/upgrade decisions and want to base such decisions on what they hear from other on the internet about "sound quality", that would be a silly thing to do.
Deckard71 post is a good example, he was told (to be fair to him) by what he thought, the source came from Marantz engineering, and then he actually heard when using his external DAC with the Marantz sounded harsh vs smooth when changing the filters that are selectable with the AV10. The fact is, he wasn't even using the Marantz's DAC, all along he was still using the external DAC because in pure direct/or direct and analog input, the Marantz DAC would have been bypassed. Yet he was so sure of what he heard, enough proof right, at least in Deckard71's case.
People got so fixated on their trust their ears thing mainly because of the internet hearsay, I am proud to be with the AH member here who, most of time do voice their opinions, though we must be getting tired of having to do it over and over again. We need to keep doing this to help counter myths being perpetuated.
This is not to say audio electronics don't make audible differences, of course they could, even dacs, and simple power amps could have audible effects depending on how they are use in a system. The point is about cases reported such as that by Deckard71 that clearly seems unreal right from the beginning. That's the kind of claims that need to be countered, to help new comers to this nice and healthy, abeit costly hobby.