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Pro Co Sound has been building professional effects since 1979. From the very beginning, the Pro Co RAT was destined to define "The Sound of the Underground." It was, after all, born underground in the cavernous basement of the Pro Co factory in downtown Kalamazoo, Michigan. From these humble origins, the RAT has evolved from a single, hand built prototype into a family of the most versatile and most recorded distortion pedals in the world. Today’s RAT family consists of the RAT2, TurboRAT, You Dirty RAT, Deucetone RAT, and SOLO. Each member of the family has its own unique tone structure.