Marshall JVM2 Serie Manual De Instrucciones página 11

To confirm the factory reset press OVERDRIVE
MODE switch.
If you want to abort, press any other switch.
Footswitch Reset:
It is possible to reset the footswitch to the
factory default status. This is achieved as
follows:
Unplug the footswitch at any of the cable sides.
Press and hold the switch #4 (right switch).
Plug in the footswitch cord.
Release the switch and the FX led will start
blinking.
If you want to erase the footswitch memory
press the switch #3. To keep the memory press
either the #1 or #2 switch. Please note that once
the memory is erased it cannot be recovered.
Release the switch and the footswitch will
synchronise with the amplifier.
The factory default is as follows:
FSW #1: Clean/Crunch Mode
FSW #2: Overdrive Mode
FSW #3: Master
FSW #4: Reverb
Hints
Hint 1: It is possible to use different modes in
the same channel with different volumes to
avoid imbalance between mode levels. To do
this simply create 2 presets in the footswitch
assigning MASTER 1 or MASTER 2 to any of
the modes.
If you do not connect any effect to the
SERIAL / PARALLEL FX LOOP the MIX control
can be used to act like an extra volume control
in any of the channels.
Hint 2: To have a tuner output muting the
amplifier, connect the tuner to the FX send and
select the Clean channel. Turn the MIX control
to WET and switch the FX loop on. Store this
preset as described before and label it for
example as ʻ t unerʼ . Obviously in this
configuration it is not possible to connect any
other effect to the loop.
Hint 3: To use a different preamplifier and
combine it with the JVM channels, connect the
external preamplifier output to the parallel loop
return and turn the MIX to WET. Connect the
external preamp input with a splitter to the
amplifiers input (it might be necessary to use an
active splitter to keep a high impedance and/or
an isolated one to avoid ground loops).
Switching the effects loop ON and OFF will
alternate between the external preamp and the
JVM preamp.
As the JVM reverb circuitry is connected after
the parallel loop it is also possible to create a
preset to add reverb to the external preamp. To
do this, simply switch the reverb ON and create
a preset in any channel with the reverb ON and
FX ON and assign it to the footswitch. That
would be external preamp + reverb.
You can also go further and assign a different
Master level to both external and internal
preamplifiers in the same way as you assigned
reverb.
Hint 4: Notes about using 2 heads
simultaneously. The suggested procedure is
connect the ʻ m asterʼ head PREAMP OUT to the
ʻ s laveʼ head POWER AMP IN and switch the
POWER AMP INSERT to ACTIVE in the ʻ s laveʼ
amplifier.
In order to track the master volume settings in
both heads (as the master volume circuitry is
wired after the loop) it is suggested to use MIDI
control with both amplifiers programmed in the
same way. Connect the MIDI IN of one of the
amplifiers to the MIDI THROUGH of the other
and the pedalboard or MIDI equipment to the
remaining MIDI IN.
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