Because it's a much nicer sounding system than the Logic7 alone, as this review attests.
Anyway, it's not as simple as you think. Read this and learn:
http://www.e90post.com/forums/showpo...9&postcount=90
Second, virtually ALL speakers need break-in time. We don't say it for marketing reasons -- it's because it makes a VERY real difference. If you had any experience in audio whatsoever, you'd know this.