my Creative Inspire 2500 has static for some reason

Sep 3, 2005
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my Creative Inspire 2500 Speaker System produces an annoying set of "whooom" from the Subwoofer each time I turn it on.

the set is currently connected to my MP3 Disc Player.
what may be causing this ?

( i tried to clear any electric cables from the surrounding of the speaker cables )
( the set was bought 2 weeks ago )