I’m not sure what escksu meant in referring to DACs etc as the source, but I take his basic point as a good one. It’s been made here before: Many people on a forum like this claim to want accuracy to the source as their ideal. Well, that’s what you essentially get once you have set up an accurate system.
Once you start playing with tone controls to “fix” certain tracks because you don’t like how they sound, you’ve departed from that stated goal and now it’s about personal preference.
Accurate to what speakers/room/volume level?