Y'all have been hearing me complain about the woofiness on my QSC K8. I have even posted a video which demonstrates the darker sound (not my video). So I am still experimenting. I tried the HF (high filter) boost (usually for vocals). That brightens things up a bit, but it adds high end distortion. So, I switched back to flat. The bass LF (low filter) has 3 setting; flat, EXT Sub, and Boost. I thought EXT Sub would extend the subs, the opposite of what I need/want. But reading up, it reduces subs for use with a separate sub woofer, or if sitting on the floor, which may induce too much bass. Well, my K8 sits on a chair. No gains if you don't try right? Initial tests indicate this may be the setting I have been looking for. It definitely cleans up/tightens up much of the woofiness which bothers me. Thoughts and inputs (I am most definitely a high end audio neophyte) appreciated.