Rear Panel; About The Three Modes; Preset Programs Mode (Recalling A Preset Program); Manual Mode - Vox VT20X Owner's Manual

Off: This mode uses the standard bias voltage, Operating the
amplifier at its nominal function.
Green (COLD): This mode uses a lower bias voltage. Each note can be
clearly heard, and unique sustain can be achieved.
Red (HOT): This mode uses a higher bias voltage. It can add more
dynamics to an overdriven sound.
CLASS button
This changes the operation of the power amp section. Each
press of the CLASS button switches it in the following
order: green -> red.
Green (A): Operates in Class A and produces a straightforward and
intuitive response.
Red (AB): Operates in Class AB and produces unique tonal nuances
through compression and crossover distortion.
The Class A/AB setting does not affect the output from the headphones jack.
Tubes/Valves
The tubes may break if they are exposed to an impact. If a tube breaks,
please seek repairs.

Rear Panel

This illustration shows the VT40X.
b
a . DC12V (VT20X) jack, DC19V (VT40X) jack
Connect the included AC adapter here.
The AC adapter is designed specifically for the VT20X / VT40X. Do
not use any other adapter, otherwise a malfunction may occur.
a
- 7 -
VT20X/VT40X Owner's manual
b . Grounding Screw
Use this screw to ground the unit. To do so, loosen the screw and attach
a grounding wire.
Depending on how the unit is connected to other devices, you may
Tip
feel a slight electrical stimulation if a soft part of your skin touches a
connected guitar or a metal part of the unit. This is caused by a very
weak current that is harmless to humans. If this bothers you, use
this grounding screw to ground the unit to an external earth.

About the three modes

Preset programs mode (recalling a preset program)

In preset programs mode, preset programs can be recalled with the
AMP MODELS knob. When this is selected, the various settings, for
example, for GAIN, TREBLE, MIDDLE, BASS, VOLUME and the effect,
will be automatically switched. Refer to the table at the end for the list of
songs programmed for each amp model.
Switching to preset programs mode
Press the PRESET PROGRAMS button once to enter preset programs
mode; the button will illuminate.
Recalling a preset program
While the PRESET PROGRAMS button is lit, turn the AMP MODELS
knob. Regardless of the positions of the knobs on the top panel, the
preset program set up for the selected amp model will be recalled.
In the preset programs mode, each press of the PRESET PROGRAMS
button switches the preset program in the following order: A, B, C. The
button lights up in green, yellow-green, red.

Manual mode

When the VT20X/VT40X is in Manual mode, it will behave like a
conventional guitar amp. In this mode, the setting positions of all
selectors and knobs in the amp section are simply applied to the sound.