Since so many here guess about so many issues...here's mine. The legend will roll off below 20hz, so does the Empire. In room characteristics may help any sub, tho. Not a lot of music content below 20hz aside from some electronic or big organ stuff. Not a lot of info on measurements on the Legend that I've seen either. What is nmdbass in any case? So the other 15% of the music time is not enjoying the music??
the other 15% is me having the radiocrad an al channel stere while i can or cook or do stuff around the house.
This is why i am more concerned about HT performace because Ilove the mid bass slam as well and the deep sub 20hz rumble (when I can get it)