I have the Pass XA 160.5 amps with small, inefficient, sealed two-way stand
mounted speakers, but when I play the Sheffield Labs Drum LP really loud, the
bass impact, articulation and speed is tremendous. I also have a small room. I
hired Jim Smith to voice my system and the system's tone, dynamics and
presence took a major step forward.
I suggest you consider hiring a really good set up guy to voice your system to
your room, at least as a starting point before you invest in new speakers. Proper
listening location and speaker placement will do wonders for your musical
enjoyment. And it is relatively inexpensive compared to a major component
change.