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JMD:1 Front Panel
Classic
9
Full - 8
10 - Modern
Deep - 7
- 7
11 - Deep
11
Classic - 6
Vintage - 5
Natural - 4
Classic - 3
- 3
Full - 2
Full -
2
16
16 - Modern
- Mod
1
1
Modern
1
3
1. Input Jack Socket
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.
2. Channel Controls
Manual - Switches the amp to manual mode. When
selected, all of the JMD:1's settings will match the
current physical positions of the controls, it will behave
just like a conventional amplifier.
Manual mode will be automatically selected when the
unit is switched on.
As the front panel effect switches (Ext FX, Delay/Tap
Tempo, Modulation) do not have a set physical state
you are free to set them as desired. Their settings will
be remembered and recalled every time the amp is set
to manual.
Channel 1, 2, 3 & 4 - For storage and recall of four of
your favourite sounds when not using the footswitch or
MIDI.
To Recall - Simply press the channel switch for the
channel you wish to recall. The channel switch will
illuminate to show it has been selected.
Remember: When a channel preset is recalled, the
physical position of the pre-amp and FX section
controls are unlikely to match the original settings used
to program the recalled preset. The front panel switches
will automatically be updated.
To Store - Dial in the tone and FX settings you require,
when happy, select which channel to store your sound
into by holding that channel switch down for more than
1 second. All channel lights will flash to indicate your
settings have been successfully stored.
All manuals and user guides at all-guides.com
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1
12 - Detuned
13 - Deep
1
14 - Solid
15
15 - Classic
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If any changes are made to the amplifier once a
channel has been recalled, the current channel light will
flash to remind you that the current settings have been
altered but not yet stored.
When changing a control, if its value matches that
stored in the currently recalled channel, the Footswitch /
MIDI Program (7) switch will illuminate for a short time.
After altering a channel's settings, pressing Compare
(2) allows you to toggle between the edited and the
original channel settings allowing you to easily compare
the changes you are making.
3. Pre-Amp
Selects one of the JMD:1's 16 Pre-Amps (3).
Each Pre-Amp is not only tonally different, but the
channel controls (4) - Gain, EQ and Volume will behave
just like the original depending on the Pre-Amp
selected. Experiment with these controls and your
guitar to fully explore the full potential of each setting.
CLEAN SECTION 1-4
Clean 1. Modern
Pre-Amp: JVM410H
Settings:
Clean Channel in Green Mode
Based on the mighty JVM Series' Clean channel, this
pre-amp option produces one of the brightest clean
tones ever to have come from a Marshall. The tight,
controlled and well balanced tone provides plenty of
clarity and punch, thanks to a tone network that lies
before the channel's main gain stage.
Pre-amp Topology: Single ECC83 pre-amplifier
stage driving a classic Marshall three band EQ feeding
another ECC83 gain stage directly coupled to an
ECC83 cathode follower
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2
Ext FX
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Clean 2. Full
Pre-Amp: JCM2000 DSL100
Settings:
Clean Channel – Tone Shift on
One of Marshall's best selling
all-valve amps to date, the DSL
continues to be the weapon of
choice for many of the world's
top players. One reason for its'
immense popularity is its
vibrant clean sound with glassy
bright edge and fat resonant
punch, which has been perfectly captured here.
Pre-amp Topology: ECC83 pre-amplifier stage
followed by a tone shaping circuit set to boost bass and
treble feeding into three ECC83 gain stages directly
coupled to an ECC83 cathode follower connected to a
lower mid frequency 'tone shifted' Marshall three band
EQ.
Clean 3. Classic
Pre-Amp: JMP-1
Settings:
Clean 1 – Bass Shift on
Straight out of the JMP-1 tonal vault comes this well
rounded tone with distinctive mid characteristics,
making this option ideal for rich chords and softer tones.
Increasing the gain results in clean lead lines with a hint
of vintage style distortion.
Pre-amp Topology: ECC83 pre-amplifier stage
followed by a tone shaping circuit with tuned bass and a
slight low mid cut feeding into an ECC83 gain stage
followed by a three band EQ.
Clean 4. Natural
Pre-Amp: JMD:1
The first of the JMD:1's new sounds, this setting is
designed to produce a totally flat response, letting the
natural tone of your guitar and the JMD:1's power
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amplifier take centre stage. The well rounded and warm
tone of this particular pre-amp makes it ideal for jazz
style playing.
Pre-amp Topology: A linear pre-amp combined with
a studio style EQ section, low-shelf at 100Hz, mid-peak
at 500Hz, high-shelf at 3.5Khz. Uncoloured pre-
amplification followed by a three band cutting EQ,
where a totally flat response pre-amp gain is achieved
when Bass, Middle and Treble are set on full.
CRUNCH SECTION 5-8
Crunch 5. Vintage
Pre-Amp: 1974 & 1959 combination
+
A unique marriage of the 1974 and 1959 models, two of
Marshall's most revered vintage amplifiers. The tonal
character of the 1974 has been matched perfectly with
the 1959's EQ section and is ideal for classic rhythm
sounds.
Pre-amp Topology: This pre-amp is the combination
of a 1974 pre-amp and power amp used as a pre-amp
stage: ECC83 pre-amplifier stage with preset tone and
gain control feeding another ECC83 gain stage directly
coupled to an ECC83 cathode follower driving a classic
Marshall three band EQ followed by an 18 Watt EL84
push pull amplifier with no feedback driving a dummy load.
Crunch 6. Classic
Pre-Amp: JCM800 2203
Raw, rough and ready – what more would you expect from
a pre-amp based on the legendary JCM800 2203! An
upfront focussed sound which embodies the term 'crunch'.
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