Used Donner Harmonic Square Effect Pedal

Discover inspiring pitch-shift textures with this used Donner Harmonic Square effect pedal in great condition. Designed for electric guitar and bass, it delivers harmonized tones with crisp tracking and a compact, pedalboard-friendly footprint. Simple controls let you dial in your blend and shift for everything from subtle doubling to bold, synthetic harmony. Rugged metal housing, standard 1/4" input/output, and 9V DC center-negative power make it an easy fit for most rigs.