Remember Dan Armstrong fx? They were nifty lil' boxes that plugged into your guitar. Fine for most guitars, but if you had a strat, forget it. The Ring-O-Matic is a floor version of their popular Green Ringer ring modulator module. Switch it on and get weird, ring-modulator fuzz, not your typical octave-up fuzz. The added Blend control allows shadings of fuzz from subtle to not-so-subtle. The Ring-O-Matic is a positive-ground effect, which means it cannot be put on a power supply chain with negative-ground pedals. It will require either it's own power supply or it can be put in a chain with other positive-ground effects (germanium fuzzes, etc).