This article is from the rec.audio.* FAQ, by with numerous contributions by Bob Neidorff others.
Many experienced listeners report that the systems sold by
Cambridge Sound Works which consist of two small satelites and
one medium sized subwoofer are a poor value if your goal is
best sound quality for the money. However, the convenience of
tiny satelites is important to some people.
Perhaps someday, someone will develop a great tiny satelite
plus subwoofer system, but all examples so far seem to suffer
from lumpy frequency response and poor reconstruction of the
stereo image. The same complaint applies to similar systems
from other makers. Some believe that it is essential to have
all of the left channel sound coming from the exact same
location for best stereo image and smooth frequency response.
This premise implies that tiny satelite plus subwoofer systems
will always be inferior.
Cambridge Sound Works also sells more conventional tower and
bookshelf systems. These, like many other speakers on the
market, are worth a listen.
However, the authors of this FAQ strongly recommend that you
ignore all recommendations and make your decision based on
your own personal listening tests.
 
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