Donner Harmonic Square Owner'S Manual Download Page 2

Connections & Controls

shift with the original signal.

Carefully selected components

The Harmonic Square pedal was 
designed and manufactured with quality 
components to ensure exceptional 
sound and sturdy performance. The 
aluminum alloy casing ensures touring 
reliability, and the all metal footswitch is 
ready for heavy duty applications. 

Features

Convenient compact size 

Variety of pitch shifter effects in one 

stompbox

Wide threshold range suitable for 

every music style 

True Bypass

Digital circuit design

Reliable aluminum alloy casing and 

all metal footswitch

Clear tone with low noise level

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Specifications

Power Requirement: 9V DC center 
negative
Current Consumption: 110mA
Dimensions: 42x93.5x52mm
Weight: 230g

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DC 9V Jack:

For power supply, use a 9-volt DC 
regulated by AC adapter, 500mA (plug 
polarity is positive on the barrel and 
negative in the center). 

WET

 

Knob: 

Adjusts the harmonic signal level.

Mode Selector:
Sharp: 

Pitch up.

Detune:

 Adjustable pitch signal 

shifted by 10 cents.

Flat:

 Pitch down.

DRY Knob: 

Adjusts the dry signal level.

Type Selector:

Selects type of pitch shifter.

Input Jack:

1/4” mono audio jack, for connecting 
guitar.  

Output Jack:

1/4” mono audio jack, for connecting 
to an amplifier. 

Footswitch And The LED:

Tap to switch the unit on/off. The LED 
will lit up when the effect is on.

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Mode Pitch up/Pitch down

Detune

±2
±3
±4

1

Oct

+2/-2 semitiones
+3/-3 semitiones
+4/-4 semitiones
+5/-5 semitiones

+7/-7 semitiones

+12/-12 semitiones
+24/-24 semitiones

-30 cents
-20 cents
-10 cents

0

+10 cents
+20 cents
+30 cents

±5
±7

2

Oct

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