Date Region Description Price Seller
USANo issue with it at all. ![Donner Harmonic Square](htt...$28.00
USAWorks great, light use. I wanted to try out a harmonic ...$23.00
USALike new with box ![Donner Harmonic Square](https://r...$35.00
USADonner Harmonic Square Octave/Pitch Shifter Pedal w/Box...$39.00
UKThe Donner Harmonic Square is a highly versatile, budge...$53.22
USASelling my Donner Harmonic Square pitch shifter/octave ...$39.00
USAAdd octaves above or below your guitarCreate detuned / ...$45.00
USA[ Octave Guitar Pedal ] With 7 shift types an...$35.00
USAVery nice. Prior owner added W and D in marker to make ...$38.00
USA Previously Owned Donner Harmonic Square Octave Pitch S...$29.99