Boost - This controls the volume of the boost and how hard it will drive the Overdrive channel which is next in the signal chain.
Lows - These will fatten up the low-end of your guitar. Particularly good for making Single Coils sound fatter than before.
Tone - This controls the overall EQ output of the pedal.
Volume - This controls the volume of the drive.
Drive - This controls the gain you'll get from the pedal. If you keep the gain down and volume up, you'll have more headroom. If you keep the volume down and the gain up, you'll have more dirt! Set it to taste.
