Why do some computere speakers make a loud clicking noise whene they are turned on after a long time? I noticed this hapening with my speakers, but only if theye where sjut down for a while. If I just turn theme off and on agein I don't heare the clicking noise. Wht is these noice. My first gues would be it has something to do with a capacitator but I would be really glad if someon could explain what it is. Thanks!