I have long felt that "good tone" is largely subtractive, in terms of allowing or emphasizing frequencies that are ear-friendly. We spent some 99.99% of our evolutionary history talking, yelling (and singing?) to each other, and evolved mechanisms that could hear the antelopes (and tigers!) in the bushes - over millions of issues and re-issues, the organism that was chosen to breed more often was the one that heard certain things better than others. So there are reasons that guitar amps don't have tweeters, pianos aren't made of steel, tuba players get more nookie than piccolo players... break out the Barry White album and think about it. Roar....