According to the research done by Harman/Samsung, listeners generally prefer a curve that's gently sloping by one decibel per octave. IE, if you want a pleasin

According to the research done by Harman/Samsung, listeners generally prefer a curve that's gently sloping by one decibel per octave. IE, if you want a pleasing sound, a loudspeaker that's playing 90dB at 100Hz should be playing 83dB at 16,800Hz. And the response curve should be consistent from point A to point B. This recommendation can be impacted by the power response of the speaker, but that's another subject...