IME with both 'full range' speakers and sat/sub systems is that when the manufacturer voices the bass in their full range speakers it is done in their room with their equipment, which may not do well in your room.
Separate powered subs can be the solution IF their adjustments are of hi-end quality. Alas, my 10 yo SVS powered subs have far from hi-end adjustments, but what I can tell you is a tiny adjustment to the XO can make or break how far up into the mid range the bass goes, and even a little bit of overshoot smears the mids and even the highs
hth
Separate powered subs can be the solution IF their adjustments are of hi-end quality. Alas, my 10 yo SVS powered subs have far from hi-end adjustments, but what I can tell you is a tiny adjustment to the XO can make or break how far up into the mid range the bass goes, and even a little bit of overshoot smears the mids and even the highs
hth