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1.  DC 9V Power Input Jack
 

You can power your GAMMA Series 

pedal from a 9-volt regulated DC 

adapter (plug polarity is positive on 

the barrel and negative in the center).

2.   Battery Capability
 

Use a Phillips head screwdriver to 

remove 4 bottom screws to access 

battery connection. High quality 

alkaline 9-volt battery can be used for 

approximately 16 hours of continual 

operation. If pedal won’t operate when 

battery is installed, battery may be 

discharged, and should be replaced 

with a fresh, fully-charged battery. Or 

connect a compatible power supply 

for non-battery operation.

3.  Footswitch
 

Push down the footswitch to toggle 

between on and bypass status.

4.  LED
 

When the LED is lit, the effect is on. 

When it’s off, the effect is bypassed.

5.  INPUT Jack
 

¼” mono audio jack, to receive the 

signal from your guitar or a previous 

pedal. Pedal draws power only when 

this jack has a plug inserted.

6.  OUTPUT Jack
 

¼” mono audio jack, outputs the signal.

7.  LEVEL Knob
 

Adjusts output level (volume).

8.  DRIVE Knob
 

Adjusts the amount of distortion.

9.  BASS, MID, TREBLE Knobs
 

Try the center (noon) position as a 

starting point for all these knobs. 

Each can then be used to cut (reduce) 

or boost (increase) sound in its 

range. The MID knob is capable of 

particularly extreme cut/boost for 

tonal versatility.

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Underside of pedal

(Bottom removed for battery access)

21510408 2209

AcousticControlCorp.com

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