There should not be any loud buzz at all. The most I can hear with the volume cranked to +10 is a soft hum that is less than the relative level of the hiss, which is way down there in level. I have to put my ear _in_ my horns to hear it at all. If you hear more than this, I would call Outlaw directly and see if they can be of help. You might have a grounding issue, or maybe an interconnect that has a poor ground. Make sure you are listening to an input that does not have anything connected also, as the buzz could be coming from a source component.