The Super Hard On, or ‘SHO’ as we fondly refer to it, is an ultra-transparent boost that goes from unity gain to a whooping 60 times the original size (watch out!), while adding a delightful high-end clarity with its 5 million ohm input impedance. This is the perfect preamp pedal. The Crackle Okay volume knob is a negative-feedback control styled after classic 60's recording console inputs. Its name is its warning: the massive output from this pedal can be super hard on your amp, so tread lightly! ZVEX Super Hard-On, Transparent Boost - Hand Painted *Finish art may vary. • MFSKU SUPER HARD ON • UPC 855245003169