Summary: I am not a Bose hater. I have a few of their items. However I ordered both the Free Space 51s and the Definitive Technology AW6500. There is a stunning difference in performance between the two pairs of speakers. The Bose do provide a sound that seems to surround the listener. However the Def Tech's are amazing. The base is solid, not mushy and the fact that the Def Tech's have a midrange and a tweeter just blow the Bose away.