How would you describe the vocals on the other speakers you auditioned? IMO it is important that you find a speaker that gives off the most natural sounding vocals to you because that is what we are most critical of since we communicate on a daily basis as part of our survival.

How often do we hear a live drummer playing in our house or someone playing a trumpet or a strike of a triangle?

You shouldn't worry to much about bass extension with a bookshelf because you can always add a sub. You also seem to like slightly rolled off highs which is a very common loudspeaker preference.

Are you returning the CB20?
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