FULLTONE USA PLIMSOUL MKII overdriveDistortion pedals usually offer two clipping choices: Soft Clipped or Hard Clipped. Soft Clipped pedals, like Tube Screamers or Full Drive 2, get their distortion by using diodes placed in the feedback loop of their Op Amps and give a cleaner, more compressed, low to medium gained overdrive sound. Hard Clipped pedals like RAT or OCD use diodes tied to ground or, unique to the OCD v2, Mosfets that are tied to the half way point between 9v and ground,