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Using a Digital Audio Analysis System, the power output of the CS21 speakers is reasonably balanced across the board; there are some slight irregularities at 200Hz, 500Hz and at 2500Hz. The trough at 500Hz shows that at this frequency the power output from the speakers is not the same as it is at the other frequencies, meaning that there may possibly be an audible dip in volume when a 500Hz sound is played. The peaks show where there could be a minor increase in volume when a 200Hz or 2500Hz sound is played. Saying this though, there were no noticeable dips or peaks in volume when I was listening to any form of audio. The actual dips are quite minor – so that would explain why the differences are not noticeable.
When you start listening to the speakers you will be very pleasantly surprised with the quality of the audio. As previously stated, the irregularities in the frequency response are not noticeable and the tone is very good, regardless of the type of audio which is being played. As with most speaker sets though, a little equalisation is advised to get the most out of your speakers and for this it is really your own preference. The bass is able to offer the humble listener a full, deep and well-rounded experience and delivers the sound well. It does, however, distort should you play some demanding audio, anything that takes the bass below approximately 27Hz will cause distortion. That is the price you must pay for buying a speaker set at this price (Retail £129.99), you have to go for far more expensive sets in order to get decent audio below 25Hz. For a final note, as you can see in the pictures on the first page of this review, the speakers are aesthetically pleasing. They are not obtrusive in any respect and will blend well into most décor. All in all a very good speaker system – one of the best you will get for £129.99. If you’re not needing surround sound, you would have to go a long way to find better. Thanks go to
Altec Lansing for supplying the speakers for review.
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