After decades of research, Maxon has designed the DS380 Distortion Master, the ultimate distortion pedal. Rich, full-frequency response with a perfectly voiced midrange and a precision-tuned low end that's big and tight without being muddy. Proprietary tone circuitry makes even the smallest amp sound like a full stack. The DS380 features true-bypass switching and is powered by a 9-volt battery or AC adapter (included).