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1: INPUT: Connect your guitar here using a shield-
ed instrument cable.
OVERDRIVE CHANNEL: A high gain channel giv-
ing you sounds from a slight edge to serious over-
drive.
2: GAIN 1: When active, sets the amount of com-
pression and distortion from the amplifier. At far
left, the sound will have a thick compressed quali-
ty. As you turn the control to the right the amount of
distortion increases. Gain 1 produces less intense
distortion than Gain 2 and is active only when the
Gain Select switch (#5) is out.
3: GAIN 2: When active, sets the amount of com-
pression and distortion from the amplifier. At far
left, the sound will have a thick compressed quali-
ty. As you turn the control to the right the amount of
distortion increases. Gain 2 produces more intense
distortion than Gain 1 and is active only when the
Gain Select switch (#5) is in.
4: SHAPE: Working in conjunction with the Gain 2
control, rotate the Shape control until you find the
sound you’re looking for. Turning the control
towards the left enhances the mid frequencies;
turning it to the right enhances the low and high fre-
quencies. (Only affects Gain 2 when active.)
5: GAIN SELECT: Switches between Gain 1 (out)
and Gain 2 (in). A footswitch (#22) overrides this
switch.
6: LOW: Adjusts the low frequency output level: to
the left reduces the low frequency output; to the
right increases it. This control allows a range of
11dB at 80Hz.
7: HIGH: Adjusts the high frequency output level:
to the left reduces the high frequency output, to the
right increases it. This control allows a range of
10dB at 10kHz.
8: LEVEL: Sets the output volume level from the
Overdrive Channel: in the far-left position there is
no output; turning the control to the right increases
the output. Use this control along with the Gain and
Shape controls (#2, 3 & 4) to create a wide variety
of sounds.
9: CHANNEL SELECT: When this switch is
pressed in the Overdrive Channel is engaged. The
Clean Channel is selected when this switch is out.
A footswitch (#22) overrides this switch. The adja-
cent LEDs indicate which channel is selected.
CLEAN CHANNEL: A normal gain channel
designed to give you crystal clear sounds.
10: LEVEL: Sets the output volume level from the
Clean Channel: in the far-left position there is no
output; turning the control to the right increases the
output level.
11: LOW: Adjusts the low frequency output level:
to the left reduces the low frequency output; to the
right increases it. This control allows a range of
22dB at 80Hz.
12: MID: Adjusts the mid frequency output level: to
the left reduces the midrange output; turning it to
the right increases it. This control allows a range of
14dB at 600Hz.
13: HIGH: Adjusts the high frequency output level:
to the left reduces the high frequency output; to the
right increases it. This control allows a range of
28dB at 10kHz.
14: DSP LEVEL: Adjust the amount of digital sig-
nal processing with this control: in the full-left posi-
tion the output signal is “dry” (no effect); rotating
the control to the right increases the amount of
effect. The DSP can be turned on and off with a
footswitch (#23).
15: DSP MODE: Select the type of digital effect(s)
desired with this control. Each category and its
central location is called out (delay, flange, etc.) by
the markings around the control; there are two
variations per effect, as follows:
GFX-120/212 Amplifier
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