I used to go to a lot of orchestral concerts - unamplified -  and one thing that I always noticed when coming home to listen to my hifi was how much less of the double basses I heard at home, and that bass drums are much more visceral live than on my hifi.  I think there is a lot of bass content in unamplified Classical music.

Another thing I have noticed over the years with many changes of equipment and speakers, is that small speakers, no matter how small the room, cannot do justice to big orchestral music.  Smaller scale music - string quartets, solo piano etc all very possible on small speakers though, even though piano and cello often reach right down to very low frequencies.