Used Donner harmonic square Effect Pedal

Dial in rich, harmonized textures with this used Donner Harmonic Square effect pedal in great condition. Designed to add octave and harmony-style layers for thicker riffs and standout leads, it features simple knob controls for quick tone shaping and a rugged, compact metal enclosure built for gigging. Standard 1/4" input/output and 9V DC center-negative power make it an easy fit on most pedalboards, delivering creative pitch-style effects without the hassle.