Speaker buzzing error

[mika.crazy]

I have edifier x 600 speakers i turned then on and there was a annoying buzzing sound from it. Though they were not connected to any computer or mp3 player

 

[rgd1101]

MERGED QUESTION
Question from mika.crazy : "My speakers are producing this annoying buzzing sound when i turn them on even when not connected to any source? I have edifie"

I have tried changing places to turn them on but no use