Marshall Amplification JVM 4 Series Manuel utilisateur

JVM

4 SERIES

USER MANUAL

ENGLISH

CONGRATULATIONS ON

PURCHASING YOUR MARSHALL

JVM AMP.

THE JVM PRODUCES A BROAD SONIC PALETTE, MAKING IT AN INCREDIBLY

VERSATILE TOOL. IT CAN TAKE YOU FROM CLASSIC CLEAN AND

OVERDRIVEN TONES TO HEAVIER GRUNT AND THEN HIGH GAIN. FULLY

PROGRAMMABLE, THE JVM SERIES HAS UNPRECEDENTED TONAL CONTROL,

WITH THREE MODES PER CHANNEL, INDEPENDENT REVERBS, PARALLEL/

SERIES FX LOOP AND STOMPWARE® FOOTSWITCH TECHNOLOGY.

WE HOPE YOU ENJOY YOUR NEW AMP AS MUCH AS WE HAVE ENJOYED

DESIGNING AND BUILDING IT FOR YOU.

THE MARSHALL TEAM

USER MANUAL

Warning! Safety instructions 3

FCC Compliance Statement 4

Overview and specication 5

Front panel functions 6

Rear panel functions 9

MIDI operation 12

Footswitch 13

Factory reset 14

Warning: before going any further, make sure

that your amp is compatible with your mains

electricity supply. If you have any doubt, please

seek help from a qualied technician – your

Marshall dealer can help you with this.

MAINS INPUT & FUSE

The specic mains input voltage rating that

your amp has been manufactured for is

indicated on the rear panel of the amp. Your

amp is provided with a detachable mains

(power) lead, which should be connected to the

mains input socket on the rear panel of the amp.

The correct value and type of mains fuse is

specied on the rear panel of the amp. Never

attempt to bypass the fuse or t one of the

incorrect value or type.

Warning: your amp must be switched off and

disconnected from the mains electricity supply

before you check and/or change any fuse.

IMPORTANT SET UP INFORMATION

Follow the start-up procedures below to safely

switch on your amplier. The procedure differs

depending on whether you plan to run your

amplier into speaker cabinets or for silent

recording.

Warning: failure to comply with the following

points may damage your amp.

Using your amp with speaker cabs

1. Make sure the power handling rating of

the speaker cabinet(s) is/are equal to or

higher than the output power of the amp.

Connect the speaker cabinet(s) to the

correct impedance speaker output(s) on

the rear panel.

Note: only use speaker (unscreened)

cables to connect the cabinets.

2. Ensure both the power switch and standby

switch are switched off and set all master

volumes on the front panel to zero.

3. Connect the footswitch cable to the

footswitch and then connect to the

footswitch socket on the rear panel of the

amp.

4. Connect the supplied mains (power) lead

into the mains input on the rear panel rst

and then into an electrical outlet.

5. Plug your guitar into the input jack socket

on the front panel.

6. Turn the front panel power switch on. The

switch will glow red.

7. After waiting a couple of minutes, turn the

standby switch on.

Warning: before you turn the standby switch

on, a (speaker) load must be attached to the

unit. Never use your amp without a (speaker)

load attached when the standby switch is on.

Using your amp for silent recording

When the standby switch is off the amp can

be used without a load for silent recording.

This mode allows you to take a signal from the

preamp section without engaging the output

power section.

1. Ensure both the power switch and standby

switch are switched off.

2. Connect the footswitch cable to the

footswitch and then connect to the

footswitch socket on the rear panel of the

amp.

3. Connect the supplied mains (power) lead

into the mains input on the rear panel rst

and then into an electrical outlet.

4. Plug your guitar into the input jack socket

on the front panel.

5. Turn the front panel power switch on. The

switch will glow red.

6. A signal for recording is available through

the series/parallel FX loop send output jack

and/or the pre-amp out/send output jack.

Warning: always ensure a load is connected

before you switch the standby switch on (to

leave silent recording mode).

TRANSPORTING YOUR EQUIPMENT

Please ensure that your amp is switched

off, unplugged from the mains electricity

supply and all removable cables have been

disconnected from your equipment before

attempting to move it.

Only move the amp on its own; do not attempt

to move it while it is stacked on top of a cabinet

or other equipment.

ENGLISH

1.0

WARNING! SAFETY INSTRUCTIONS

PLEASE READ THIS MANUAL CAREFULLY BEFORE PLUGGING IN. FOLLOW ALL INSTRUCTIONS AND HEED ALL WARNINGS.

1.1

FCC COMPLIANCE STATEMENT

This device complies with part 15 of the FCC

Rules. Operation is subject to the following two

conditions:

1. This device may not cause harmful

interferance, and

2. This device must accept any interferance

received, including interferance that may

cause undesired operation.

This equipment has been tested and found

to comply with the limits for a Class B digital

device, pursuant to part 15 of the FCC rules.

These limits are designed to provide reasonable

protection against harmful interferance in a

residential installation.

This equipment generates, uses and can radiate

frequency energy and, if not installed and used

in accordance with the instructions, may cause

harmful interferance to radio communications.

However, there is no guarantee that

interference will not occur in a particular

installation. If this equipment does cause

harmful interferance 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:

• Reorient or relocate the receiving antenna.

• Increase the seperation between the

equipment and the receiver.

• Connect the equipment into an outlet on

a circuit different from that to which the

receiver is connected.

• Consult the dealer or an experienced radio

/ TV technician for help.

CAUTION: Any changes or modications not

expressly approved by the party responsible

for compliance may void the users authority to

operate the equipment.

This device complies with CAN ICES-3(B)/

NMB-3(B).

ENGLISH

4-channel JVM amps boast 3 modes giving you

a total of 12 different sounds to choose from.

The front panel contains dedicated sets of EQ

and gain controls for each of the 4 channels,

master and reverb sections. The master section

is comprised of 2 footswitchable master

volumes, plus master resonance and presence

controls that work universally on all 4 channels.

The reverb section consists of reverb level

controls for each channel.

JVM410C

VALVES

4 x ECC83, 1 x ECC83 (phase splitter) and 4 x

EL34

CHANNELS

4 (Multi): Clean, Crunch, Overdrive 1 and

Overdrive 2

POWER

100W

EQUALISATION

Treble, middle, bass, presence and resonance

EFFECTS

Digital reverb

SPEAKERS

2 x 12”

1 x Celestion Heritage G12H (8Ω, 80W)

1 x Celestion Vintage (8Ω, 70W)

OUTPUTS

5 x 1/4” jack speaker outputs, selectable 16Ω/

8Ω / 4Ω load

Emulated line out (XLR)

MIDI thru

EFFECTS LOOP

2, 1 x series parallel, 1 x series

JVM410H

VALVES

4 x ECC83, 1 x ECC83 (phase splitter) and 4 x

EL34

CHANNELS

4 (Multi): Clean, Crunch, Overdrive 1 and

Overdrive 2

POWER

100W

EQUALISATION

Treble, middle, bass, presence and resonance

EFFECTS

Digital reverb

OUTPUTS

5 x 1/4” jack speaker outputs, selectable 16Ω/

8Ω / 4Ω load

Emulated line out (XLR)

MIDI thru

EFFECTS LOOP

2, 1 x series parallel, 1 x series

ENGLISH

2.0

OVERVIEW AND SPECIFICATION

ENGLISH

3.0

FRONT PANEL FUNCTIONS

1 2 4 8 9 12 14 18 16 19

3 5 1011 13 17 1576

JVM410H

JVM410C

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48912141816

ENGLISH

3.1

FRONT PANEL FUNCTIONS CONTINUED

The front panel is divided into 3 main

secons: channels, reverb and master. Each

of the channels has 3 modes which are

dierenated by the colour of the light in the

buon used to change channel. These are

green, orange or red respecvely.

1. POWER SWITCH

This turns the amp on and off.

2. STANDBY SWITCH

The standby switch is used in conjunction with

the power switch to warm up the amp before

use. Turn power switch on for 2 minutes before

switching standby on.

Set the standby switch to the off position

during breaks in performances.

Note: when the standby switch is off the amp

can be used without a load for silent recording.

See the ‘Using your amp for silent recording’

start-up procedure for more information.

3. FOOTSWITCH/MIDI PROGRAM SWITCH

This switch has a dual function:

1. Pressing it once will enter ‘footswitch

program’ mode. This is indicated by a solid

red light.

2. Pressing it twice will enter ‘MIDI program’

mode. This is indicated by a blinking red light.

See more information on these modes later in

this manual.

4. FX LOOP SWITCH

Engages/disengages the serial/parallel FX loop

for the current channel.

Note: This switch does not affect the power

amp insert / serial loop.

19. INPUT JACK SOCKET

Connect your guitar here using a ¼” jack

instrument cable.

CHANNEL SECTION

Pressing a channel button has two functions:

• When pressing in the same channel it

cycles the gain modes: GREEN (lowest

gain level) > ORANGE > RED (highest gain

level)> GREEN etc. Each mode remembers

its own previous FX, reverb and master

settings.

• Coming from a different channel recalls

the last setting in the new selected

channel.

Note: when you leave and then reselect a

channel, it will automatically recall the last

active mode.

15. CLEAN CHANNEL

Green mode: This is the cleanest of the three

modes. 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. This is the only mode where this

happens.

Orange mode: This mode offers a punchy

sound that’s easy to overdrive.

Red mode: This is mode adds another gain

stage after the tone stack.

16. CRUNCH CHANNEL

This channel has a more typical Marshall

preamp circuit characteristic of ‘gain then tone’.

Green mode: This mode shares the preamp

topology of the classic Marshall JTM45/1959

Plexi™ models (i.e.: gain + gain + tone). This

means the sound and response will be similar

to these vintage ampliers, but with a bit more

gain than is found in the originals.

Orange mode: This mode is reminiscent of the

JCM800 2203 amplier and offers gritty, . The

gain structure is gain + gain + gain + tone.

Red mode: This shares the topology of the

orange mode, but with more gain, giving you

sounds similar to a hot-rodded JCM800.

17. OD1 CHANNEL

Green mode: This is very similar to the sound

found in crunch red mode, allowing you to dial-

in two different crunch sounds.

Orange mode: This adds another gain stage to

the OD1 green mode, resulting in hard rock/

heavy metal tones.

Red mode:Adds more gain to the OD1 orange

for a high gain Marshall sound.

18. OD2 CHANNEL

This channel is similar to the OD1 channel but

with even more gain and the middle control

shifted to being centred around 500hz (instead

of the more typical Marshall value of 650hz).

OD2 provides 3 high gain modes that are ideal

for both lead and modern rhythm metal tones.

REVERB SECTION

The digital reverb is routed in parallel to the

main signal and mixed using a valve. The reverb

does not degrade the direct signal when

engaged and when off it is effectively removed

from the circuit.

10. REVERB SWITCH

Switches the reverb effect on or off for the

current channel.

ENGLISH

Note: 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.

13. REVERB CONTROL (CLEAN CHANNEL)

Adjusts the level of reverb applied to the clean

channel.

14. REVERB CONTROL (CRUNCH CHANNEL)

Adjusts the level of reverb applied to the

crunch channel.

11. REVERB CONTROL (OD1 CHANNEL)

Adjusts the level of reverb applied to the OD1

channel.

12. REVERB CONTROL (OD2 CHANNEL)

Adjusts the level of reverb applied to the OD2

channel.

MASTER SECTION

The master volume controls set the overall

volume of the amp across all channels. Master 1

and Master 2 can be assigned to any mode and

can be switched back and forth.

3.2

FRONT PANEL FUNCTIONS CONTINUED

5. MASTER 1

Master 1 is used on all channels/modes by default.

6. MASTER 2

To set a channel/mode to use master 2, select

the channel and mode, push the master button

to engage master 2 and then switch out of the

mode. When you re-visit the mode, the amp

will automatically recall which master volume

control you were previously using.

7. MASTER SWITCH

Switch between master 1 and master 2 for

different volume settings on the same channel/

mode. The red LED in the switch indicates

that master 2 is engaged. The light is off when

master 1 is engaged.

Note: presets stored in the footswitch will

recall whether master 1 or master 2 was

selected. However, it will not recall the previous

level of the master volume control.

9. PRESENCE

Adjusts the high frequencies of the power amp.

Increasing high frequencies adds more bite to

your sound.

8. RESONANCE

Adjusts the low frequencies of the power amp.

Increasing low frequencies adds more bottom

end giving you a fatter sound.

Warning: care should be taken to avoid over

exertion of the speaker cones in high resonance

settings.

Note: both the presence and resonance

controls are power amplier controls and

therefore only have effect when playing

through a speaker.

ENGLISH

4.0

REAR PANEL FUNCTIONS

2 43 5 7 8 9 10 11 12 13 146

JVM410C

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JVM410H

ENGLISH

1. POWER INLET

The supplied mains power lead is connected here.

The mains input voltage rating that your amplier

has been built for is shown on the rear panel.

Warning: before powering on, ensure the

amp is compatible with the mains voltage of

the country that the amp is being used in. If

you have any doubt, please get advice from a

qualied person.

2. MAINS FUSE

Protects the amplier and mains supply in the

event of a fault. The correct value of mains fuse

is specied on the rear panel.

SERIAL/ PARALLEL FX LOOP:

This is a programmable FX loop located after

the pre-amp, right before the reverb and serial

loop circuits. The FX Loop switch engages/

disengages this effects loop.

13. SERIAL / PARALLEL FX LOOP: SEND

Connect your external FX equipment here

using a ¼” jack instrument cable.

12. SERIAL / PARALLEL FX LOOP: RETURN

Return your signal from external FX equipment

here using a ¼” jack instrument cable.

11. SERIAL / PARALLEL FX LOOP: FX LEVEL

Congure the loop for use with either

professional equipment (+4dBu setting) or with

guitar level effects like effects pedals (-10dBV

setting).

10. SERIAL / PARALLEL FX LOOP: MIX

CONTROL

Control the amount of effect that can be dialled

in with the mix control. 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.

Note: if you do not connect any effect to the

serial/parallel effects loop the mix control can

be used to act like an extra volume control in

any of the channels.

Warning: when mixing the wet and dry

signals the external effects processor’s output

should be congured to remove the direct

(unprocessed) signal. If the amp sounds thin

after connecting an external effect check that

no direct signal is being returned from the

processor’s output.

Note: if the FX loop is on and the mix control

is set to wet without an external processor

connected, the amplier will be muted.

ADVANCED USES OF THE SERIAL/PARALLEL

EFFECTS LOOP

• To have a tuner output muting the amplier,

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 and label it for example as ‘tuner’.

With this conguration it is not possible to

connect any other effect to the loop.

• As the JVM reverb circuitry is connected

after the parallel loop you can create

presets that affect an external preamp,

including reverb and/or selecting a

different master volume.

• To use a different preamplier and

combine it with the JVM channels:

1. Connect the external preamplier output

to the parallel loop return and turn the mix

to wet.

2. Connect the external preamp input with a

splitter to the ampliers input.

POWER AMP INSERT / SERIAL LOOP

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.

9. PRE-AMP OUT / SEND

Connect your external FX equipment here

using a ¼” jack instrument cable.

8. POWER-AMP IN / RETURN

Return your signal from external FX equipment

here using a ¼” jack instrument cable.

Note: you can plug an external preamp into this

return jack to override the JVM preamp section

and use the power section only. The master

controls and the emulated line out are located

after the serial loop so it is still possible to use

those features when using an external preamp.

Note: to use 2 heads simultaneously, the

suggested procedure is to:

1. Connect the ‘master’ head pre-amp out to

the ‘slave’ head power-amp in.

2. Switch the power-amp insert to active in

the ‘slave’ amplier.

In order to track the master volume settings in

both heads it is suggested to use MIDI control

with both ampliers programmed in the same

way. Connect the MIDI in of one of the amps to

the MIDI thru of the other and the pedalboard

or MIDI equipment to the remaining MIDI in.

4.1

REAR PANEL FUNCTIONS CONTINUED

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