So with no mention of amplification, I feel the recommendations are a bit blind. Perhaps you've great amplification, but if not, improved will aid in structure and depth. Also, your source and cabling all influence. Massed stands?
I've listened to this speaker through a friend's electronics, CEC 2000 highly modified, custom tube DAC, custom preamp and VTL 60wpr triode monoblocks and they sang with plenty of bass in a room 30X20X12. Actually thought they sounded a bit congested in the midrange.
But, perhaps the suggestions are legitimate for your needs.