Your room, with hardwood floors and no rugs, may be contributing to your brightness problem. The 2.4 has excellent bass but it is tight and not bloated or overly warm; you may feel it is too lean. If you have not aggressively broken in the speakers, you might want start there--play them loudly for a good 100 hours or more with a variety of dynamic music. It can improve the bass.
I own 2.4's by the way.
I own 2.4's by the way.