3Why FX Seven Overdrive

The Seven is an overdrive effect. It is named after a local mayoral politician (candidate number 7) who won on a platform of being tight and focused on streamlining and improving the city. Likewise, the Seven is singular on tightening up your overdrive tone. The effect emphasises mids with a selectable range of frequencies for a mids boost. The voicing also reduces bass muddiness and manages the overall high end to achieve an overall balance of good sounding tone. Just like how candidate 7 is focused on making the city fair and liveable for most of the population. 

WHAT DO THE KNOBS AND SWITCHES DO?

1. Volume – Make the effect louder or softer. Usually louder. 
2. Gain – Turn clockwise ("CW") for gain. Turn counter-clockwise ("CCW") for less. On single coil guitars, the gain kicks in after 12 o'clock on the knob, allowing for clean boost usage. On humbuckers, the gain is noticeable almost immediately.
3. Tone – Turn CW for more treble. Turn CCW for more bass. This knob is interactive with the Mids knob.
4. Mids – This knob selects the mid frequency that would receive a fixed amount of boost. The frequency ranges from about 150Hz (CCW) to 1500Hz (CW).