I'm just wondering for those of you that have worked with Kenwood x889 headunit. What exactly do the features do, more specifically the WOW set of features. I mean I know that true bass is a type of bass boost and focus attempts to raises the stage, and SRS 3D is kidna self explanatory. But what are the parameters of the functions. For example, the true bass. Does every level boost +3dB, at what frequencies does it boost, at what slope, etc..?