Used Donner Harmonic Square Effect Pedal

Add shimmering harmonic texture to your rig with this used Donner Harmonic Square effect pedal. In fair condition with visible wear from regular use, it still delivers distinctive harmonic-style tones for creative leads and chord work. Compact, pedalboard-friendly enclosure with straightforward controls and standard 1/4-inch input/output for easy integration with guitars, basses, and other instruments. Powered by a typical 9V DC pedal supply, it’s a budget-friendly way to expand your sound.