http://www.ckkelectronic.com ANKA DISTORTION has a three-way toggle switch (CLIP) that changes the diodes used in the clipping section. With the Gain below noon, the pedal produces a natural low to medium Gain tone. In the center, you can obtain a High-Gain Distortion with a tight bottom end . With the Gain past noon, the pedal produces a vintage high-gain response. The unique internal clean boost after the gain stages makes the tone more warm and rich.