Vox VT100X Owner's Manual page 6

The buttons for effects not being used will turn off.
Tip
More detailed adjustments can be made to effects by using Editor/
Tip
Librarian software.
TAP button
This sets the modulation speed and delay time for
effects. The interval between two presses of the TAP
button will be set as the speed/time. The TAP button
will blink according to the specified speed/time.
To set a precise speed/time that matches the tempo of a song, press
Tip
the TAP button several times along with the beat of the song.
Hold down the TAP button for at least one second to bypass all effects
and engage tuner function ("Using the tuner" on page 8).
VALUE 1 and VALUE 2 knobs
These adjust the parameters of the effects.
When the tuner function is engaged, the VALUE 1
knob adjusts the noise reduction.
The available parameters differ depending on the
effect ("About the amp models and effect types" on page 9).
Using Editor/Librarian software, more detailed adjustments can be
Tip
made to the tone.
f . AUX IN jack
Connect the analog output of an audio device to this jack.
You can connect an audio player to this jack, then play
along on your guitar while listening to your favorite songs.
Adjust the volume for the headphones jack with the connected device.
g . Headphones jack
Use this jack if you want to output directly to a mixer or
recording device, or when you want to use headphones. The
signal that is output from this jack is taken from directly before
the power amp, and the cabinet response of the guitar amp is applied to it.
When a device is connected to this jack, no sound will be output
from the internal speaker.
Be sure to connect a stereo plug to this jack.
h . Tubes/Valves section
When the amp model is changed, the parameters in the valve section
Tip
are returned to the standard settings for each amp.
BIAS SHIFT button
This adjusts the bias for the tubes. When the operating
point of the tube is changed the character of the distortion
will change. Each press of the BIAS SHIFT button switches
it in the following order: off -> green -> red.
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.
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