Over the last few years I've been using the Empress ParaEq to some success, but I still run into some problem areas that I can't seem to fix. Could I, or should I try an adjustable high pass filter? Is this something that can be run in tandem with the paraeq, or would I be conflicting frequencies? Should that be used separately? Does the HPF help with this for you? Also in some rooms I can easily lose a note, meaning it doesn't come out as loud...... Does HPF help that? Would a LPF help with higher notes that gwt soaked up? I am specifically talking about what a room or stage does, since notes are ringing even at home and it changes from stage to stage. Thanks!