Just an FYI, but our hearing's "frequency response" changes depending on level. At lower levels, we are less sensitive to the lowest and highest frequencies, and midrange becomes more dominant. As you go up in level, the response begins to get more even. You can see this in the classic Fletcher-Munson equal loudness curves and is why stereos back in the day commonly had a "loudness" switch which gave a bit of boost to the lows and the highs so that things would sound a bit more natural when listening at lower volumes.
Leave it to Steve to just level set things. Very well stated sir.