I have Rev 2.0 and I am using Logitech 340's with the sub. When I play MP3s I am getting really deep bass. I have to turn the bass all the way down to make it not sound muddy. I didn't have this problem with my turtle beach Santa cruz. I have messed with the equalizer and the presets, its the only way to fix it. My question is this the way the board comes standard? I bought this refurbed from NewEgg.com