I think what's happening here is he's (she's?) gone from 800 cu ft to 7000+. He's gone from a standing wave jungle to almost no standing waves. He was used to the walls bending and now there's no boom. Like Doug Schneider. I read his reviews and his walls are always bending. If his walls aren't bending, the speakers under review must suck...lol! When I listen to the same tunes, all I get is lovely smooth bass and no boom!

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated