Marshall Amplification JVM2 Series User manual

1
From Jim Marshall
I would like to thank you personally for selecting
one of our new ‘JVM’ amplifiers.
Since I started Marshall Amplification in 1962 I
have witnessed some incredible breakthroughs
and advances in amplifier design technology,
such as master volume amps, channel
switching, reverb, effects loops, MIDI
technology, speaker emulation and digital
effects processing, to name just a few. These
may all seem commonplace features nowadays
but that certainly wasn't always the case.
However, the same values that were present in
the first Marshalls are still very much here today:
meticulous workmanship, reliability, stylish looks
and, above all, great Marshall tone.
As a musician myself I fully understand the necessity of
achieving the right tone and feel to help inspire guitarists
to reach their full creative potential - be they aspiring
beginners or more seasoned players. With this in mind I set my
experienced R&D team the task of designing a new range of
amplifiers that truly captured the essence of the Marshall sound while boasting the
very latest technological advances.
The result is the JVM Series - our latest range of all valve amplifiers that combine all
of the aforementioned values plus a few extra attributes and, of course, all of the
magical Marshall tone you could ever want. I am proud to say that the new JVM
Series is truly a testament to the Marshall legacy of great guitar products.
I wish you every success with your new Marshall. Welcome to the family…
Yours Sincerely,
Photo: Dr Jim Marshall OBE and daughter Victoria (Managing Director)
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Overview
I. Channels, Modes & Memory
Presenting the 2-channel, 100W and 50W
all-valve JVM amplifiers. Their 2 channels boast
3 modes, giving you a total of 6 different modes
to choose from - each with its own unique gain
structure. Even though their front panel contains
a total of 16 control knobs and 6 LED switches,
the JVM is simple to understand and operate
thanks to its extremely logical front and rear
panel layouts.
The front panel contains dedicated sets of
controls for each of their 2 channels -
LEAN / RUN H and OVERDRIVE - plus
MASTER and REVERB sections. Each channel
contains the familiar controls, Volume, Bass,
Middle, Treble and Gain. The REVERB section
consists of 2 Reverb level controls, one for each
channel while the MASTER section is comprised
of 2 footswitchable Master Volumes, plus master
RESONAN E and PRESEN E controls that
work universally on both channels.
Each of the 2 channels has 3 switchable modes.
These are selected by the MODE switch
dedicated to each channel. To select a channel
press its respective MODE switch (or step on
the relevant button on the supplied 4-way
footswitch - see section II. Footswitch). To
scroll through the selected channel's 3 modes
keep pressing the said button and the colour of
the LED in the switch will change from green to
orange to red and then back to green. Doing this
steps-up the gain level each time (red being the
highest and green the lowest for each channel)
and changes the channel's tonal voicing to suit.
When you leave and then reselect a channel, it
will automatically recall the last active mode as
both channels remember the last mode they
were in until a change is made. For instance, if
you select the Overdrive channel's orange mode
and then go to the lean channel, when you
reselect the Overdrive channel it will still be
orange.
In addition to channel and Mode selection, other
features switchable via the front panel and the
supplied 4-way footswitch are Reverb (on/off)
Master Volume selection (1 or 2), and
Series/Parallel effects loop (on/off). All 3 of
these options are also remembered by each
Mode.
To sum up, each of the JVMs 6 Modes will
remember its most recent Reverb, FX loop and
Master Volume selection. Additionally mode
setups can also be saved and recalled to one of
128 locations via MIDI.
II. Footswitch (U patent pending)
The JVM come supplied with a 4-way
programmable footswitch which can be
connected to the amp via any standard guitar
cable.
*Please note that the supplied Footswitch lead is
unscreened and not suitable for guitar.
The 4-button footswitch features 5 LEDS
marked LEAN / RUN H, OD, MASTER,
REVERB & FX. The LEDs for each of the 2
channels are 3-coloured Green, Orange and
Red, visually telling you which channel and
mode is selected alongside the status of Master,
Reverb and FX loop.
The footswitch enables you to assign any of its
4 switches to instantly recall any front panel
function (Switch Store Mode) or complete
channel setup (Preset Store Mode) in any order
and combination.
For example, you could program it so that:
Switch Store Mode
Any footswitch is assigned to act as any one of
your amp’s front panel switches:
hannel/Mode; Reverb on/off; Master Volume
1/2 and FX Loop on/off.
If a switch is assigned to select a particular
channel once is has been activated, it can be
used to scroll through the three modes, just like
its respective front panel switch.
Or…
Preset Store Mode
Each switch can be programmed to instantly call
up a combination of JVM button options to form
a Preset.
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For example, you could program a mixture of
switching functions (in our example switches #1
and #2 work in Preset Store mode, and #3 plus
#4 work in Switch Store mode), so that:
Footswitch #1 = Overdrive channel, green mode
with Master Volume ‘1’, Reverb ‘on’ and FX loop
‘off’.
Footswitch #2 = lean channel, red mode with
Master Volume ‘2’, Reverb ‘off’ and FX loop on.
Footswitch #3 = FX loop on/off
Footswitch #4 = Master 1/2
All the settings are stored within your footswitch;
this means it can be plugged into any JVM
amplifier and all your footswitch settings can be
instantly recalled.
Details on how to program your footswitch can
be found later in this manual.
III. Power Amp
The power amp stage of the JVMs is based on
the same as the one found in the J M800 2203
and 1959 Superlead amplifiers and their 50W
cousins, responsible for the legendary Marshall
roar it has been adjusted to suit the variety of
tones found in the JVM. This section features
Presence and Resonance control to help shape
the overall tone of your JVM amplifier.
Your JVM is also equipped with a Silent
Recording mode. When the STANDBY switch is
OFF the power amplifier section is disabled but
the rest of the amplifier remains fully
operational.
IV. Studio Quality Reverb
The Marshall JVM is equipped with a studio
quality digital reverb routed in parallel to the
main signal and mixed by means of a valve.
When the reverb is engaged no degradation of
the direct signal occurs and when off it is
effectively removed from the circuit. Each of the
JVM’s channels also has its own dedicated
Reverb level control.
The Reverb switching has been designed to
avoid abrupt cut offs in the reverb tail so when
changing from channel to channel or switching
the reverb off, its tail naturally decays.
MODEL:PEDL-00045
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Channel Overview
The JVM’s front panel is divided into 2 main
sections: hannels and Master. Each of its
channels has 3 modes which are distinguished
by a different coloured light (green, orange or
red) appearing in the respective MODE switch;
the preamplifier’s gain structure is uniquely
reconfigured for each and every mode.
CLEAN/CRUNCH CHANNEL (8)
CLEAN/CRUNCH GREEN MODE: This is the
cleanest of the three modes and, in keeping with
traditional clean amps, it uses a simple and
straightforward circuit keeping the signal as pure
as possible. In this Mode the channel’s Volume
control is taken out of circuit as is the case in
vintage amplifiers of this nature. This is the only
JVM mode where this happens.
CLEAN/CRUNCH ORANGE MODE: This mode
shares the preamp topology of the classic
Marshall JTM45/1959 ‘Plexi’ models (i.e.: gain +
gain + tone) but with a bit more gain than is
found in the originals.
CLEAN/CRUNCH RED MODE: This mode is
reminiscent of the Marshall J M800 2203
amplifier, a staple of hard rock. The gain
structure is gain + gain + gain + tone.
OVERDRIVE CHANNEL (9)
OVERDRIVE GREEN MODE: This is very
similar to the hot-rodded J M800 sound found
in ‘ runch Red’, allowing you to dial-in two
distinctly different yet similar crunch sounds if
you so wish - one in each channel.
OVERDRIVE ORANGE MODE: This adds
another gain stage to the ‘Overdrive Green’
circuit, resulting in a sound that’s perfect for
singing leads and hard rock/heavy metal tones.
OVERDRIVE RED MODE: Adds more gain to
the ‘Overdrive Orange’ for a high gain Marshall
sound.
The Basics
We recommend that you fold out the inside back
cover of this manual so that diagrams of the
amp’s front and rear panels are visible while you
read.
MAINS INPUT & FUSE (17)
Your amp is provided with a detachable mains
(power) lead, which is connected here. The
specific mains input voltage rating that your
amplifier has been built for is indicated on the
rear panel.
WARNING: Before going any further, make
sure your amplifier is compatible with your
electrical supply. If you have any doubt,
please get help from a qualified technician -
your Marshall dealer can help you in this
respect.
The correct value of mains fuse is specified on
the rear panel of the amplifier. NEVER attempt
to bypass the fuse or fit one of the incorrect
value.
Mains (POWER) Switch (1)
This is the On/Off switch for the mains electric
power to the amplifier.
Note: Please ensure the amplifier is switched off
and unplugged from the mains electricity supply
whenever it is moved!
INPUT Jack Socket (10)
You must always use a screened (shielded)
guitar cable and never use an unscreened
(unshielded) speaker cable. Also, this cable
should be one of good quality. If you are in any
doubt regarding this, your Marshall dealer will be
more than happy to help and advise you.
Getting Started & Powering Up
1. Make sure that the speakers/cabinet(s) are
connected to the correct impedance
LOUDSPEAKER jack(s) on the rear panel (11).
See page 8 for specifics regarding impedance
matching. If you’re using an extension cabinet
make sure its rating is enough to handle the
power of the amp and also that you’re using a
proper speaker cable. Never use a screened
(shielded) guitar cable for this purpose.
WARNING!
1. Failure to do any of the above will damage
your amp.
2. NEVER use your amp without a (speaker)
load attached when the Standby Switch is
ON.
Marshall recommends you always leave a
(speaker) load attached to the unit.
2. Ensure that both MASTER VOLUMES on the
front panel (5) are set to zero.
3. onnect the Footswitch able to the
Footswitch and then connect to the
FOOTSWIT H Socket (15) on the rear panel of
the amplifier.
4. onnect the supplied mains (power) lead into
the MAINS INPUT (17) on the rear panel first
and then into an electrical outlet.
5. Plug your guitar into the INPUT jack socket
(10) on the front panel.
6. Turn the front panel POWER switch (1) on.
This will glow red then wait for a couple of
minutes.
7. After waiting a couple of minutes, engage the
STANDBY switch (2). Leaving the amp on
‘Standby’ for a period allows the valves to come
up to their correct operating temperature. In
order to prolong valve life, the STANDBY switch
should also be used to turn the amplifier on and
off during breaks in a performance.
STANDBY Switch & Silent recording (2)
As stated above the STANDBY Switch is used in
conjunction with the POWER Switch to ‘warm
up’ the amplifier before use and to prolong the
life of the output valves.
When the amplifier is in standby mode the
whole preamplifier section continues running at
its nominal voltages whilst the power amplifier
remains in a standby status. This allows the
amplifier to be used for silent recording or
preamplification purposes.
NOTE: Only when the STANDBY is off can
the amplifier be used without a load for silent
recording. Always ensure a load is
connected when leaving the silent recording
mode, i.e. when switching the STANDBY
switch ON.
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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 LEAN. The
amp switches to the last lean mode you had
(let’s assume it was LEAN 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 RESONAN E control
emphasises the natural speaker’s resonance for
an improved bass response. In the same way,
increasing the PRESEN E control emphasises
the speaker’s 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 ‘^’ shape when they are fully
counterclockwise, which is felt as a mid boost,
to a ‘v’ 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.
are 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 FOOTSWIT H
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. onnection 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 FOOTSWIT H / 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 FOOTSWIT H 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.
To store the current status simply:
Set the amplifier to FOOTSWIT H PROGRAM
mode (red light ON).
Press and hold the desired switch for about 3
seconds.
The FX footswitch LED will flicker a couple of
times indicating that the preset has been stored.
In switch store mode, any of the footswitches
can be configured to replicate the front panel
switches and the amplifier will react exactly in
the same way as when you operate them on the
front panel.
All the front panel switches can be mapped to
any of the footswitches without any limitation.
The only exception is the FOOTSWIT H / MIDI
PROGRAM switch which cannot be assigned to
the footswitch.
To assign any of the front panel switches
(except FOOTSWIT H / MIDI PROGRAM) to
any of the footswitches simply:
Set the amplifier to FOOTSWIT H PROGRAM
mode (red light ON).
Press and hold the desired footswitch.
While holding the footswitch down, in less than
3 seconds, press the front panel switch you
want to map.
The FX footswitch LED will flicker a couple of
times indicating that the switch has been
mapped.
From now on the selected footswitch will act
exactly in the same way as if you press the
related front panel switch.
Switches and presets can be assigned as
wished without limitation and in any order
(again, except the FOOTSWIT H / MIDI
PROGRAM switch). The footswitch configuration
is stored in the footswitch itself, not in the
amplifier. Resetting the amplifier will not affect
the footswitch configuration as well.
The footswitch can be hot-swapped and
synchronises itself with the amplifier after
connection. However it is recommended to
connect the footswitch lead to the footswitch
side first and then connect it to the amplifier.
MIDI operation
Pressing the FOOTSWIT H / MIDI PROGRAM
switch (3) twice puts the amplifier in MIDI
waiting mode, the LED will flash until a valid
MIDI program change command is received.
On reception of a MIDI program change
command the amplifier stores the current status
( hannel + FX + Reverb + Master Settings) in
the MIDI program number received. It is
possible to store up to 128 different MIDI
presets.
To exit this status without waiting for incoming
MIDI data press the FOOTSWIT H / MIDI
PROGRAM switch (3) again.
Note about MIDI channels: By default the
amplifier is configured to listen to MIDI channel
#1 but it can be changed to listen to any of the
16 MIDI channels as follows:
Switch the amplifier off (Power switch (1), not
Standby (2)).
Press and hold the FOOTSWIT H / MIDI
PROGRAM switch (3).
Switch the amplifier on (Power switch (1)).
Release the FOOTSWIT H / MIDI PROGRAM
switch (3), the LED will start to flash.
Send ANY MIDI command using your MIDI
pedalboard or any other MIDI equipment.
The amplifier will detect which channel came in
and configure itself to listen to that MIDI channel
only. From now on any MIDI preset you had
previously stored will be activated only on the
new channel regardless of what channel you
used before, this allows a fast reconfiguration
should there be a MIDI conflict with any other
outboard equipment.
If you want to exit the MIDI channel selection
without any action press the
FOOTSWIT H / MIDI PROGRAM switch (3)
while waiting for MIDI data.
Front Panel Operation

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Rear Panel Operation
SERIAL / PARALLEL FX LOOP (12)
The JVM is equipped with a series / parallel FX
loop. onnect your external FX equipment input
to the JVM SEND jack, and the FX output to the
JVM RETURN jack. As described previously,
this effects loop can be bypassed from the front
panel and the amount of effect can be dialed in
with the MIX control.
The +4dBu/-10dBV switch allows you to
configure the loop for its use with either
professional equipment (+4dBu setting) or with
guitar level effects like effects pedals (-10dBV
setting).
When MIX is set to WET all the signal goes
through the external loop, adding more direct
(unprocessed) signal as you turn it towards
DRY. This allows you to mix any amount of the
external effect without loosing or degrading the
direct signal quality.
When mixing the WET and DRY signals the
external effects processor’s output should be
configured to remove the direct (unprocessed)
signal or unpleasant phasing effects may occur
when mixing it again in the amplifier. If the
amplifier sounds thin after connecting an
external effect check that no direct signal is
being returned from the processor’s output.
Note that if the FX loop is ON and the MIX
control is set to WET without an external
processor connected, the amplifier will be
muted.
POWER AMP INSERT / SERIAL LOOP (13)
This is a passive loop connected right before the
master controls. It is a line level loop so it is
recommended to only use high headroom
devices to avoid signal degradation. Plugging
only into the return jack allows the use of the
JVM’s power section overriding the preamp.
Master controls and the emulated line out are
located after the serial loop so it is still possible
to take advantage of those features when using
an external preamplifier. The loop can be taken
off the circuit by pressing the BYPASS switch,
but as opposed to the Series / Parallel loop this
switch cannot be programmed.
EMULATED LINE OUT (14)
The pre master volume signal, processed
through a 4x12 speaker cabinet emulator and
electronically balanced is made available at this
connector.
FOOTSWITCH (15)
onnect the supplied footswitch using any
standard 1/4" jack mono lead. Using any other
type of footswitch rather than the supplied will
have no effect and will be ignored by the
amplifier.
MIDI In / Through (16)
onnect any external MIDI equipment to the
MIDI In DIN socket. A copy of the signal in this
connector will be available on the MIDI thru
socket to allow daisy chaining of MIDI
equipment. Note that the JVM only accepts
incoming data and it is not able to send any
MIDI commands.
SPEA ER Outputs (11)
There are 5 speaker outputs available on the
rear panel. They are labelled according to the
intended impedances:
16 Ohm: connect any 16 Ohms guitar cabinet to
this jack.
8 Ohm: connect a single 8 Ohms guitar cabinet
or two 16 Ohms guitar cabinets.
4 Ohm: connect a single 4 Ohms guitar cabinet
or two 8 Ohms guitar cabinets.
WARNING: Although the JVM amplifier has 5
speaker outputs, never attempt to connect more
speakers than rated. The safe combinations are
1x16 Ohm, 1x8 Ohm, 1x4 Ohm, 2x16 Ohm or
2x8 Ohm. Any other speaker configuration may
stress the power amplifier section and in
extreme cases may lead to valve and/or output
transformer failure.
HINTS & TIPS
Factory Reset
This will erase all the MIDI presets and set MIDI
reception channel to #1. Please note that once
the memory is erased it cannot be recovered.
Switch the amplifier off (power switch off, not
standby switch).
Press and hold LEAN/ RUN H HANNEL
switch.
Switch the amplifier on (power switch on, not
standby switch).
The 2 channel LEDs will glow red.
Release the switch.
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: lean/ runch 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 lean 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 ‘tuner’. 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. onnect 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 ‘master’ head PREAMP OUT to the
‘slave’ head POWER AMP IN and switch the
POWER AMP INSERT to A TIVE in the ‘slave’
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. onnect 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.
9

Unas palabras de Jim Marshall
Me gustaría agradecerte personalmente el que hayas
comprado uno de nuestros nuevos amplificadores “JVM”.
Desde que fundara la empresa Marshall en 1962 he
sido testigo de los avances más increíbles y rompedores
en la tecnología del diseño de los amplificadores, tales
como los amplificadores volumen master, la
conmutación de canales, la reverb, los lazos de efectos,
la tecnología MIDI, la simulación de altavoz y los
procesadores de efectos digitales, por nombrar unos
cuantos. Estas características tan comunes hoy en día,
no lo fueron tanto hace unos años. Sin embargo, los
mismos valores que estuvieran presentes en los primeros
amplificadores Marshall están todavía hoy en nuestros
amplis: un riguroso proceso de construcción, un acabado
vistoso y estilista y, sobre todo, el gran Sonido Marshall.
omo músico que soy, entiendo perfectamente la necesidad de
conseguir ese sonido que te inspire y te ayude en el proceso
creativo - ya seas principiante, iniciado o profesional - on esto en
mente, encargué a mi equipo de I+D la tarea de diseñar una nueva familia
de amplificadores que captara totalmente la esencia del Sonido Marshall, a la vez que
dispusieran de los últimos avances tecnológicos.
El resultado es la Serie JVM - nuestra última serie de amplificadores de válvulas que
combina todos los valores que hemos mencionado antes más unos cuantos atributos más
y, por supuesto, toda la magia del Sonido Marshall. Estoy orgulloso de poder decir que la
nueva Serie JVM es verdaderamente un testamento al legado de los buenos productos de
guitarra de Marshall.
Te deseo grandes éxitos con tu nuevo Marshall. Bienvenido a la familia…
Sinceramente,
1110
Fotografía: Dr. Jim Marshall OBE y su hija Victoria (Directora General)
ESPAÑOL
JVM210H Head JVM205H Head
Power (RMS) 100W 50W
Valves 5x E 83 + 4x EL34 5x E 83 + 2x EL34
Main Guitar - Input Impedance 470kΩ470kΩ
Emulated Output - Level +4dBu +4dBu
FX Send Level - selectable -10dBV, +4dBu -10dBV, +4dBu
Weight 22kg 17.5kg
Size (mm) W, H, D 750 x 310 x 215 750 x 310 x 215
Technical Specification - Heads
JVM210C Combo JVM205C Combo JVM215C Combo
Power (RMS) 100W 50W 50W
Valves 5x E 83 + 4x EL34 5x E 83 + 2x EL34 5x E 83 + 2x EL34
Main Guitar - Input Impedance 470kΩ470kΩ470kΩ
Emulated Output - Level +4dBu +4dBu +4dBu
FX Send Level - selectable -10dBV, +4dBu -10dBV, +4dBu -10dBV, +4dBu
Speaker(s) 1x Vintage + 1x Heritage 1x Vintage + 1x Heritage G12B
Weight 34.5kg 29.5kg 26.5kg
Size (mm) W, H, D 690 x 510 x 265 690 x 510 x 265 605 x 510 x 265
Technical Specification - Combos
* EUROPE ONLY - Note: This equipment has been tested and found to comply with the
requirements of the EM Directive (Environments E1, E2 and E3 EN 55103-1/2) and the Low Voltage
Directive in the E.U.
* EUROPE ONLY - Note: The Peak Inrush current for the JVM210H and JVM210 is 52 amps.
The Peak Inrush current for the JVM205H, JVM205 & JVM215 is 26 amps.
Note: This equipment has been tested and found to comply with the limits for a lass B digital device,
pursuant to part 15 of the F rules. These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
N Reorient or relocate the receiving antenna.
N Increase the separation between the equipment and the receiver.
N onnect the equipment into an outlet on a circuit different from that to which the receiver is connected.
N onsult the dealer or an experienced radio/TV technician for help.
ENGLISH
Follow all instructions and heed all warnings
EEP THESE INSTRUCTIONS !

JVM210H / JVM205H front panel
JVM210H / JVM205H rear panel
3
421 9 10765
8
11 12 13 14 15 16 17
JVM210C / JVM205C / JVM215C front panel
JVM210C / JVM205C / JVM215C rear panel
4
3 2 1810
9
151617 11121314
567

53
CLEAN
SHAPE
V6:A V6:B V7:A V7:B V8:A V8:B
V5
V1
V2
V3
V4
PHASE SHIFTER
EMULATED
LINE OUT OUTPUT VALVES (1 & 4 NOT USED IN 50W)
V9:B
REVERB MIXER
CATHODE
FOLLOWER
REVERB
BYPASS
PRE-AMP OUT
/ SEND
PRE-AMP OUT
/ RETURN
POWER AMP INSERT
SERIES LOOP
V9:A
LOOP
RECOVERY
CATHODE
FOLLOWER
SEND RETURN
MIX
SPEAKER
OUT
MASTER 2
MASTER 1
PRESENCERESONANCE
CLEAN
CRUNCH
OD
FX LOOP
BYPASS
PARALLEL LOOP
CLEAN / CRUNCH
GAIN
GAINOD / GAIN
INPUT
GREEN : V6:A, V7:B
ORANGE
RED
: V6:A, V7:A GAIN OFF, V7:B
: V6:A, V7:A, GAIN ON, V7:B
GREEN
ORANGE
RED
: V6:A, V7:A GAIN ON, V7:B
: V6:A, V6:B, V7:A GAIN OFF, V7:B
: V6:A, V6:B, V7:A GAIN ON, V7:B
CLEAN /
CRUNCH
OVERDRIVE
CRUNCH VOL
CLN / CR
TONE
OD
TONE +4 / -10
OD VOL
GAIN STAGES
VALVE CHART
V5
V4
V9 V8 V7 V6
V3 V2 V1
REVERB
LEVEL
52
JVM 2 Channel Block Diagram