Hi all. Once again I have a query for you. I have the EAD Powermaster 1000 amp. I know that it has a very high gain, which causes a "hiss" to be heard through speakers even if there is no signal present. With my MC-1, there was a "hiss" that is audible but not distracting. It could be heard from about 2-4 feet away. With my MC-12B, their is a "hum" that is overwhelmingly loud. It is very distracting. I can even hear the hum, with low decibel passages from music or a DVD. Is there a difference between the line level outputs to the amp of the MC-1 to the MC-12B? Just wanted to make sure there was nothing wrong with the MC-12B.