This is a very low gain, clear overdrive pedal. It really enhances the snap of your strings with single coils and works well with humbuckers. At maximum gain the tone control can be very bright. With the gain all the way at maximum, the tone control needs to be set at minimum. The toggle switch gives you the clipping options. The down position used 4X914 diodes for the most compression at max gain and the up position yields more output - less compressed overdrive. The middle position disconnects the clipping diodes.