SHIVVER has a ruthless heart of a Rat but otherwise it shares very little DNA with a mere rodent. It's an extremely aggressive sounding distortion if driven hard, but can also be dialed back to offer more subtle tone shaping if desired. Besides your standard Volume and Distortion controls, SHIVVER also includes a powerful 3-band EQ, a Tightness control and a 3-position toggle switch that alters the frequency emphasis of the Middle control.