collapse expand iconDescription

The Used Donner Harmonic Square Effect Pedal is in great condition, delivering precise octave and pitch-shifting effects in a compact design. With seven shift types (+2, +5, +7, -5, -7, -12, and +12 semitones) and three tone modes (sharp, flat, and detune), this pedal offers versatile sound shaping for any guitarist. The true bypass circuitry ensures a clean signal path, while the durable aluminum alloy casing guarantees reliability for live performances or studio sessions. Easy-to-use controls include a Shift knob for pitch selection, a Fine-tune knob to adjust sound precision, and a Wet/Dry knob for blending the effect. Designed to work with DC 9V power (adapter not included), this pedal is perfect for adding harmonics and dynamic pitch effects to your guitar rig. Whether you're crafting layered melodies or unique soundscapes, the Donner Harmonic Square is a powerful tool for creative musicians.

Featured Articles