Donner Harmonic Square User manual

Harmonic Square is a compact delay
pedal for guitar and bass. This multi-
mode pitch shift stompbox delivers a
variety of tone-shift and detune sounds.
Introduction
Overview
Owner’s Manual
Precautions
READ CAREFULLY BEFORE
PROCEEDING
Please keep this manual in a convenient
place for future reference.
Power Supply
Always use a DC 9V center negative AC
adapter. Use of an adapter other than
that specified could damage the unit or
cause malfunction and pose a safety
hazard.
Always connect the AC adapter to an
AC outlet that supplies the rated voltage
required by the adapter.
Disconnect the AC adapter from the AC
outlet when during lightning storms or
not using the unit for an extended
period.
Connections
Always turn off the power before
connecting or disconnecting. Make sure
to disconnect all cables and AC adapter
before moving the unit. This will help
prevent malfunction and damages.
Environment Considerations
Avoid using the unit in any of the
following conditions that could cause
malfunction:
●Extremely hot or cold places
●Under direct sunlight
●Magnetic fields
●Near heaters and other heat sources
●Sandy or dusty places
●Places that are extremely humid or
exposed to splashing water
●Places with lots of vibrations
Electrical Interference
Devices that are very susceptible to
interference or that emits powerful
electromagnetic waves (e.g. radios and
TVs) should not be placed near this unit,
as interference could occur.
Electromagnetic interference could
cause malfunction and could corrupt or
destroy data.
Always operate this unit at a suitable
distance from these devices.
Handling
Do not apply excessive force to the
switches and other controls, exposing
the unit to strong impacts, which could
cause it to break.
Do not put foreign objects or liquids into
the unit.
Never open the case or attempt to
modify the product in any way since this
can result in damage to the unit.
Clean only with a soft, dry cloth.
●Multiple pitch shift tones
With 7 shift types and 3 tone mode
toggles, Harmonic Square gives you 21
of options of semitonal, octave, and
detune sounds.
●Easy, flexible controls
Select from Sharp, Flat, or Detune
mode and then take your tone up or
down through the 7 shift types. WET
and DRY knobs let you adjust the pitch

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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www.donnerdeal.com
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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