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JMD:1 Front Panel continued
Classic
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Full - 8
10 - Modern
Deep - 7
- 7
11 - Deep
11
Classic - 6
Vintage - 5
Natural - 4
Classic - 3
- 3
Full -
Full - 2
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16 - Modern
- Mod
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Modern
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Lead 16. Modern
Pre-Amp: JVM410H
Settings:
OD1 Channel in Orange Mode
The JVM Series provides the JMD:1 with an all-round
modern lead sound, derived from the former's OD1
channel at its 2nd gain stage, delivering plenty of cut,
edge and sustain.
Pre-amp Topology: Four cascaded stages of gain:
An ECC83 gain stage followed by treble boosting and
tuned bass tone shaping circuitry with the gain control
feeding into an ECC83 gain stage, connected to an
ECC83 pre-amplifier stage configured as a clipper into
an ECC83 gain stage, directly coupled to a cathode
follower driving a classic Marshall three band EQ.
4. Pre-Amp Controls
Gain - Controls the level of signal entering the pre-amp.
At lower settings the sound will be cleaner and the
amount of distortion is more controllable from your guitar
or your playing style. At higher settings, more distortion is
available. The overall effect on the signal will depend on
the topology of the currently selected pre-amp.
Bass - Turning the Bass control will affect the amount of
low frequencies, or bottom-end, in your guitar tone.
Rotating this clockwise will increase the amount of lower
tones, generally making your sound deeper and is
especially useful at lower volumes. Turning this control
anti-clockwise will reduce the bass frequencies in your
tone, producing a more cutting sound – especially useful
at higher volumes.
Middle - Adjusts the middle frequencies. Turning the
control anti-clockwise will yield a more hollow sound with
the bass and treble frequencies appearing to be more
accentuated. Turning it back clockwise increases the
middle, adding body to the sound.
All manuals and user guides at all-guides.com
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12 - Detuned
13 - Deep
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14 - Solid
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15 - Classic
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Treble - By adjusting the Treble control you can add or
take away the higher frequencies in your guitar tone. By
increasing the amount of treble you will make your tone
brighter, ideal for more percussive playing styles.
Volume - Controls the overall level of the pre-amp signal
that is fed to the power amp section.
5. Effects Section
Modulation
Mod Adjust - As the control is turned clockwise it selects
one of four modulation effects, increasing the modulation
speed as it is turned through each section. Setting this
control to minimum selects the noise gate.
Gate - An ultra fast studio quality noise reducer. Instead
of abruptly cutting the sound once the threshold is
reached like a standard noise gate, an expander
progressively attenuates the signal following its dynamics.
The Mod Depth control sets the threshold, the level at
which the gate starts to effect the signal. The Gate
senses the playing dynamics, adjusting its reaction
accordingly. This preserves natural decay of held chords
or notes and also a fast response to staccato style
playing.
Adjust the Mod Depth control to set the point where the
noise reduction begins to work. Make sure that when
adjusting Mod Depth you are not picking up hum from the
amplifier or other equipment, as it may result in a higher
setting than needed.
Chorus - Based upon a classic bucket brigade circuit, the
Chorus effect provides deeply detuned sweeps to subtle
shimmers.
Phaser - Creates fluid waves which wash across your
tone. Roll back the depth to create gentle vibe like ripples.
Flanger - Producing metallic edged textures that
envelope your sound; at slow speeds the regen increases
to create jet like sweeps, while at high speeds rotary
speaker effects can be created.
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Ext FX
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Tremolo - The first new Marshall to feature a tremolo
since the 1970s, it recreates the natural amplitude swell
and decay of a valve-based design.
Mod Depth - Sets the depth of the currently selected
modulation effect or the threshold of the gate.
Modulation - Turns the current modulation effect and
gate on and off.
Delay
Delay Adjust - Selects one of four delay types. As the
control is turned clockwise through each effect, the delay
time is increased to a maximum delay time of 1000ms. As
the delay time is increased, the number of repeats is also
increased, providing short slap-back delays to long
sprawling echoes.
Hi-fi - A pure delay line.
Analogue - Additional filtering recreates the sound of the
guitar cascading through an old analogue delay circuit.
Tape - A darker delay line with wow and flutter, as found
on old tape delays.
Multi - A multi tap delay line with two rhythmic repeats.
The extra tap appears at ¾ of the current delay time.
Delay Level - Controls the level of signal sent to the
Delay effect.
Delay & Tap Tempo - When the delay is off, pressing this
switch turns the delay on.
When the delay is on, tapping this switch sets the delay
time to match the time between the taps.
When the delay is on, holding this switch in for over half a
second turns the delay effect off.
Reverb - Controls the level of signal sent to the reverb.
The reverb decay is also adjusted as the level is
increased, complementing your chosen setting.
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FX Loop - This is a programmable FX Loop which
features a MIX control on the rear panel and is located
after the pre-amp, right before the effects section.
Pressing the FX Loop switch engages this FX Loop.
Please refer to the Serial / Parallel Loop description later
on in the handbook for a more detailed explanation of its
operation.
6. Master Section
Presence - This control emphasises the high frequencies
in your tone. Turning this control up adds crispness and
bite. Use the presence control to alter the overall sound of
the amplifier to suit the acoustics of the room or venue
you are playing in.
Master - Controls the overall level of the power amplifier.
Note: Both the Presence and Master Volume power amp
controls are not storable and have a global effect on the
overall tone and volume of the amplifier.
7. Footswitch / MIDI Program
Enables the programming of the supplied 6-Way
Footcontroller and assigning of complete set-ups via
MIDI. See the Footcontroller & MIDI section of this
handbook for more information.
8. Power LED indicator
This red LED will illuminate when the Power switch is
turned on.
9. Standby switch
The Standby switch is used in conjunction with the Power
switch (10) to 'warm up' the amplifier before use, to
prolong the life of the output valves and to mute the
amplifier when required, such as short breaks in
performance or when using the amp for silent recording.
10. Mains (Power) switch
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!
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