

The Donner Harmonic Square is an octave pedal with seven modes effect and a three-way toggle switch that allows you to choose from Sharp, Detune, or Flat modes. The pedal also consists of Dry and Wet knobs which you can tweak to select the dry signal level and control the harmonic signal level respectively. Packaged in a sturdy, aluminum-alloy enclosure, the Harmonic Square includes an LED indicator displaying the working state, digital circuit design, and true bypass producing a transparent tone.
Specifications:
1. Input: 1/4″ Monaural Jack
2. Output: 1/4″ Monaural Jack
3. Power Supply: DC 9V (Negative in the center)
4. Working Current: 110mA
5. Dimensions: 95(D) * 45(W) * 48(H)mm
6. Weight: 250g (With box)
Precautions:
- Do not use the pedal in high temperature, high humidity, or subzero
environments.
- Do not use the pedal in direct sunlight.
- Please do not disassemble the pedal by yourself.
- Keep the manual for future reference.
Package included:
1 x Donner Octave Square Pedal
1 x User’s Manual
Watch the latest video demos and reviews for the Harmonic Square from YouTube. Stompbx updates this every six months to reflect the most popular reviewers and guitar pedal demos for each pedal.
Below are live Reverb listings for the Donner Harmonic Square from Reverb. Stompbx automatically aggregates current offers to give you a quick look at available models, conditions, and prices. Perfect for comparing options and making an informed purchase.
Very Good
$33
Excellent
$33.99
Very Good
$35
Brand New
$54.49
Browse through eBay listings for the Harmonic Square compiled in real-time. From vintage finds to brand-new units, see a variety of purchasing options. This automated collection helps you explore deals and find the right pedal at the right price.
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