It is funny how people misinterpret a lack of low end bass to an unbalanced sound.
Well, it is unbalanced in a way.. A chunk of the audible spectrum is missing. Though, it is more complicated than that as our brain is able to actually fill in the fundamental tones if all the harmonics are produced.
Getting loudspeaker tone quality exactly right is really a matter of balance. Even slight variations in the relative contribution of bass, midrange and treble may dramatically alter our impressions of a loudspeaker.
Then you put the speakers in a room and all bets are off as room acoustics take over.
