I was fooling around with my setup the other night, when I realized one of the speakers has a very slight buzz or hum sound coming out of it besides the normal hiss one hears when you turn them on...It doesn't appear to get louder when I crank the volume. I switched electrical cords, switched outlets and played with the gain and EQ settings...to no avail...there is a definite buzz in one of the speakersShould i send it back or do you have the same thing in any of your speakers...Thanks Brian