I am with Roxy54 in that all speakers color the sound relative to what was produced within the recording chain from the source.
What exactly is a speaker box sound?
In another thread the comment was made that all speakers with baffles cause them to have edge diffraction effects which makes it easy to hear the speaker itself, instead of the music.
Maybe I'm spoiled but it's been a very long time since I have heard this effect in real life. What speakers have you heard lately which sound exactly like speakers instead of music?