Lets not get too technical.A speaker fed identical signal level will produce the same output, but the room will make a big difference, just as where you position speakers does. A small speaker that sounds thin and bright in a large room can be transformed by moving to a smaller room. Low tech demo: pick up your jam-box and walk around the house, it sounds like your changing the volume as you move closer to walls and into smaller areas. Thats why setting up speakers can be so difficult. As always try it in your room .I have heard speakers that would not play bass-lines in my room, sound fine in larger rooms. Try before you buy.
Does room size affect volume and bass?
I listened to a pair of Sonus Faber Electa Amatour II, I love them, only one problem, when I have one of my Reference Recordings with the Dallas Wind Symphony on, when it is playing loud, like around 90 DB and the bass drum cracks the speaker cone reaches excusion. This was at my dealers room which is 4 times the volume of my 19x13x8 room. He said that if the speakers were in my room playing at the same volume, they probably wouldn't hit the cone excersion. What do you think?