Hey guys so just got the 560. I hooked it up to a couple monitors and I noticed the sound would change, very flat and more midrange when I would switch the internal onboard speakers off. When I would switch them back on the sound would have much more bass and hi end in the equalization side to it. I can kind of get close to the sound manually adjusting it with the assign knobs, but it sound much better. Can this be overcome? Or do you guys think it has to do with impedance inputs and outputs etc affecting the sound