Friedman Dirty Shirley PedalThe Friedman Dirty Shirley all tube amp is well known for being one of the most flexible and touch responsive single channel amplifiers on the market. Now you can get that same tonal versatility, sensitivity and harmonically rich overdrive in a pedal. The Dirty Shirley Overdrive packs the same intuitive control set as the amplifier, allowing you to dial in your perfect shade of rock in no time. It doesn't matter if you want a high output cleaner tone