This is hugely important to know about the F1-X. The mid is a cut only passive control, so at anything less than 10 you are cutting mids. Also, the flat position for both the bass and treble controls is around 2 or 3. If you set the 3 EQs at what you might intuitively think is flat at 5-5-5, you will actually be setting up the classic slapper's smiley face EQ, with hugely boosted lows and highs and scooped out mids.