I have Warwick PROFET 3.2 head. It has 4 knob EQ. The knobs are labeled Bass, Low Mid, High Mid and Treble. Problem is that in the user manual frequencies are not listed for those knobs. What is the easiest way to find out? I know i should trust my ears, but i'm just starting to learn how find appropriate EQ setting and I was very surprised to learn that warwick manual didn't have those frequencies listed. All suggestions and tips are welcome.