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6
ENGLISH
Channel Section
Pressing a channel button has two functions:
When coming from a different channel it recalls
the last setting in the new selected channel.
When pressing in the same channel it cycles the
modes: GREEN > ORANGE > RED > GREEN...
Each mode remembers the FX, Reverb and
Master settings.
Example: You are in OVERDRIVE ORANGE
with FX + REVERB and you press CLEAN. The
amp switches to the last Clean mode you had
(letʼs assume it was CLEAN GREEN with
REVERB). If you press the OVERDRIVE switch
you go back to OVERDRIVE ORANGE with FX
+ REVERB. This allows bouncing between
channels without losing the settings. If you now
press OVERDRIVE again, you go to
OVERDRIVE RED with whatever FX, MASTER
and REVERB settings you had last time you
were in this mode.
Pressing REVERB (7) switches the reverb ON
and OFF in the current channel.
Pressing FX LOOP (4) switches the parallel FX
loop ON and OFF in the current channel.
Master Section
REVERB Control (7)
Alongside the REVERB switch each channel
has its own reverb control allowing individual
level settings of the effect.
MASTER 1 / MASTER 2 (5)
These are the master volume controls of the
amplifier. They can be assigned individually to
each of the modes as you wish and the master
selection will be stored in each of the modes.
PRESENCE, RESONANCE (6)
These controls are power amplifier controls and
only have effect when playing through a speaker
(not in silent recording). They affect how the
power amplifier reacts to the connected
speakers and how much control the amplifier
has over them.
Increasing the RESONANCE control
emphasises the natural speakerʼs resonance for
an improved bass response. In the same way,
increasing the PRESENCE control emphasises
the speakerʼs high frequencies which will be
heard as an improved high frequency response
which adds presence to the sound.
Presence and Resonance constitute a powerful
power amplifier equaliser, allowing responses
from a ʻ^ʼ shape when they are fully
counterclockwise, which is felt as a mid boost,
to a ʻvʼ shape when they are turned clockwise,
which is felt as a scooped sound. Again, the
effectiveness of these controls is highly
dependant on the kind of connected speakers.
Care has to be taken to avoid over excursion of
the speaker cones in high resonance settings.
FX LOOP (4)
This is a programmable FX loop which features
a MIX control on the rear panel and it is located
after the pre-amp, right before the reverb and
serial loop circuits. Pressing the FX Loop switch
(4) engages this effects loop. Please refer to the
Serial / Parallel Loop description later on in the
handbook for its operation.
FOOTSWITCH / MIDI PROGRAM (3)
This switch has a dual function:
Pressing it once we enter the FOOTSWITCH
PROGRAM mode. It is indicated by a
continuous red light.
Pressing it twice we enter the MIDI PROGRAM
mode. It is indicated by a blinking red light.
Footswitch program and use
The JVM range features a new type of fully
configurable footswitch. Connection to the
amplifier requires a standard mono 1/4" jack to
jack cable. Any guitar lead will work and
practically there should be no limit in its length.
When the front panel FOOTSWITCH / MIDI
PROGRAM switch is off, the footswitch operates
in safe mode and executes the commands the
moment the switch is pressed down.
If you enter the FOOTSWITCH PROGRAM
mode (LED red) you will be able to program the
footswitch but nevertheless the footswitch and
the amplifier will remain fully operational with the
only difference that the commands will be
executed when releasing the footswitches, as
opposed to the normal mode.
Each of the individual footswitches has 2 modes
of operation: preset store and switch store.
In preset store mode, any of the footswitches
can be configured to store the current amplifier
status. The current channel, master, FX and
reverb status will be stored and recalled when
the respective footswitch is pressed.
Front Panel Operation
JVM 2 Ch Owners Manual Book-00089-01 /12/15 inner.qxd:Layout 1 14/12/15 10:08 Page 6
8


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