IMac external speakers making noise

I am not sure if this is the correct place for this question...
but my speakers I have connected to my iMac make an annoying staticky noise all the time. It does this no matter what volume my iMac is set at, but it will go away if I turn the volume down on my speakers. When I plug my iBook or iPod in, the sound is not there. I have replaced cords and tried different inputs on the tuner, but the noise is still there.
Is there some kind of option for the iMac sound output to fix this?

Hi Don,
Griffin made the iFire a few years ago that does just that...connect the Pro Speakers to any computer. Google it and I'm sure you can find one.
John

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