i just have a question concerning my speakers and my laptop. when my computer runs on its battery, and the spekers are plugged in, its normal. as soon as i plus in the ac cable, there is a buzz that comes from the speakers, even when nothing is playing. the speakers just have a headphone jack, and i plug that into the laptops port. they work fine, its only effed once i plug the laptop in. does anybody have a solution to this?