The Flatiron Fuzz is extremely versatile. At lower drive settings it remains fairly clean and adds a pleasing mild distortion. As the drive is turned up it transports you to a world of arena rock and produces spectacular, thick, meaty tones. The Flatiron Fuzz features three controls: Volume, Drive and Filter. Volume sets the output level while Drive adjusts the amount of sustain and distortion. The unique Filter control is actually a low pass filter with a movable cut-off frequency. This is especially cool because it lets you dial in just the right amount of high-end... from dark to raunchy.