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1: INPUT: Connect your guitar here using a
shielded instrument cable.
OVERDRIVE CHANNEL: A high gain channel
giving you sounds from a slight edge to serious
overdrive.
2: GAIN 1: When active, sets the amount of
compression and distortion from the amplifier. At
far left, the sound will have a thick compressed
quality. 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
compression and distortion from the amplifier. At
far left, the sound will have a thick compressed
quality. 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
frequencies. (Only affects Gain 2 when active.)
5: GAIN SELECT: Switches between Gain 1
(out) and Gain 2 (in). A footswitch (#21) over-
rides 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 out-
put, 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 cre-
ate 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 (#21) overrides this switch.
The adjacent 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 out-
put; 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 out-
put; to the right increases it. This control allows
a range of 28dB at 10kHz.
14: REVERB LEVEL: Adjust the amount of
reverberation with this control: in the full-left
position the output signal is “dry” (no reverb);
rotating the control to the right increases the
amount of reverb. Reverb can be turned on and
off with a footswitch (#22).
GX-120OH Amplifier
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