Whenever I go up (closer to the body) on the fretboard, it has a tendency (as the strings are thick) to make a loud boomy sound. I've tried cutting the mids and the low-mids, even the lows, but nothing really worked. What frequency do I cut (I'm asking as I don't think I experimented enough)? If it's not the EQ I have to worry about. What is it? I would greatly appreciate to know, as I've only been playing for 3 months.