The Donner Harmonic Square is a highly versatile, budget-friendly digital pitch shifter and octave mini-pedal for guitars and basses. It allows musicians to easily alter their instrument's tuning, add harmonies, and create unique detuned effects without needing to manually retune or swap guitars

Opened and used once, still in original box.

Features

  • 1.7 modes effect and 3 way toggle switch select between different modes.
  • 2.Digital circuit design, true bypass provide transparent tone.
  • 3.Whole Aluminium-alloy classic, stable and strong.
  • 4.LED indicator shows the working state.
  • 5.DC 9V Adapter power supply.

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.

Listed4 days ago
ConditionExcellent (Used)
Excellent items are almost entirely free from blemishes and other visual defects and have been played or used with the utmost care.Learn more
Brand
Model
  • Morpher
Finish
  • Red
Categories
Year
  • 2026

Product safety information may be available here.

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