Ok, I have been working with my Dual Rec for a while now trying to get that non muddy chugga chugga sound. When I palm mute, I want it to rumble the floors, yet I cannot seem to get that tone. I am using a Marshall 1960BX cab with Greenbacks. Can you guys get the nice low end rumble from a standard 440 tune? No drop D's. If so, what settings do you use? Whenever I try to do it, it gets muddy and crappy sounding.