Manual Marshall JVM410 Series (page 3 of 8) (English)

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Overview

I. Channels, Modes & Memory

Presenting the 4-channel, 100 Watt, all-valve

JVM amplifier (JVM410H head or JVM410C

2x12" combo). Its 4 channels boast 3 modes,

giving you a total of 12 different modes to

choose from - each with its own unique gain

structure. Even though its front panel contains a

total of 28 control knobs and 8 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 its 4 channels - CLEAN,

CRUNCH, OD1 & OD2 - plus MASTER and

REVERB sections. Each channel contains the

familiar controls, Volume, Bass, Middle, Treble

and Gain. The REVERB section consists of 4

Reverb level controls, one for each channel

while the MASTER section is comprised of 2

footswitchable Master Volumes, plus master

RESONANCE and PRESENCE controls that

work universally on all 4 channels.

Each of the 4 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 6-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

all 4 channels remember the last mode they

were in until a change is made. For instance, if

you select the Crunch channel’s orange mode

and then go to the Clean channel, when you

reselect the Crunch channel it will still be

orange.

In addition to channel and Mode selection, other

features switchable via the front panel and the

supplied 6-way footswitch are Reverb (on/of

Master V

olume 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 JVM’s 12 Modes will

remember it’s 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 (UK patent pending)

The JVM410H or JVM410C come supplied with

a 6-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 6-button footswitch features 7 LEDS

marked CLEAN, CRUNCH, OD1, OD2,

MASTER, REVERB & FX. The LEDs for each of

the 4 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

6 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:

Channel/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. For example, you could program it so

that:

Footswitch #1 = Crunch channel, green mode

with Master Volume ‘1’, Reverb ‘on’ and FX loop

‘off’.

ENGLISH

Footswitch #2 = Clean channel, red mode with

Master Volume ‘2’, Reverb ‘off’ and FX loop on.

All the settings are stored within your footswitch;

this means it can be plugged into any JVM

4-Channel 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 100 Watt JVM is

based on the same as the one found in the

JCM800 2203 and 1959 Superlead amplifiers,

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 JVM410H and JVM410C are

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 4 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.

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Marshall JVM410 Series Manual

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