Front panel features – Marshall Amplification MG100DFX User Manual

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1. INPUT jack

Use a good quality guitar cable (i.e. one that’s

screened/shielded) to plug your guitar in here.

2. Clean Channel GAIN control

The Clean Channel has two selectable modes,

Clean & Crunch. When in Clean mode, the Gain
control takes you from clean, bell-like tones to a
mild, bluesy distortion at high settings. When in
Crunch mode, this control takes you from a creamy,
‘70s crunch, to the roar of a hot-rodded JCM800
and all points in-between.

3. CLEAN / CRUNCH Select

Push switch to select either clean or crunch

sounds on the normal channel (push in for Crunch).

4. Clean Channel BASS control

Turning up the Bass control will add warmth and

low-end depth to your clean sound. The Bass control
can be used in conjunction with the FDD switch (21) to
produce deep sounding, valve-like clean tones that
are well defined yet still full and round.

5. Clean Channel MIDDLE control

Adjusting the middle frequencies in your Clean

Channel will vary the amount of body to your sound.
Attenuating (decreasing) the middle by turning this
control anticlockwise will yield a more hollow sound
with the bass and treble frequencies appearing to be
more accentuated. Conversely, increasing the
middle will add body to the Clean Channel’s sound.

6. Clean Channel TREBLE control

Increasing the Treble will make your clean sounds

brighter and more cutting, turning it down will
decrease your tones edge and make it sound softer
as a result.

7. CHANNEL SELECT switch

This push switch allows you to change between

the amp’s two channels, Clean and Overdrive, via
the front panel. When this switch is ‘out’ the Clean
Channel is engaged, pushing it ‘in’ switches to the

Overdrive Channel. Channel switching can also be
done via the included two-way footswitch (when the
footswitch is connected the CHANNEL SELECT
switch is not functional).

Note: When the Overdrive Channel is selected,

the OD LED (8) will light up red.

8. OD LED

When illuminated, this LED indicates that the

Overdrive Channel has been selected by either the
Channel Select switch (7) or the supplied two-way
footswitch.

9. Overdrive Channel GAIN control

Turning up the Gain control will increase the

amount of preamp distortion generated in the
Overdrive Channel. Low Gain control settings will
produce classic rock and blues tones. Crank this
control for fat and aggressive sounds that are
perfect for soloing or hard rock and nu-metal riffing.

10. OD1 / OD2 Select

OD1 mode (switch out) offers more distortion than

most amps, OD2 (switch in) takes you to the next
level and is definitely not for the faint-hearted!

11. Overdrive Channel BASS control

Turning up this control will add extra low-end

‘thump’ to high gain riffs and a warm, natural
sounding depth to lower gain crunch tones. Using
the Bass control in conjunction with the FDD switch
(21) will allow you to dial in the exact amount of low-
end ‘thump’ and tightness you are looking for.

12. Overdrive Channel MIDDLE control

Adjusting the middle frequencies in your Overdrive

MG100DFX & MG100HDFX Front Panel Features

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7 8

13. Overdrive Channel TREBLE control

This important knob controls the aggressive top-

end ‘sizzle’ you have on high gain sounds and the
‘cut’ and definition of lower gain crunch tones.
Experimenting with this control will help you to
dial in your own signature tones on your amp.

14. Overdrive Channel CONTOUR control

This highly effective tone control works by

radically modifying the mid-range (body) of your
sound. The tone can vary from traditional and
woody sounding (control set at 0), to balls-to-the-
wall (control set midway), to aggressive, ‘scooped’
and modern (turned up to 10) and all points in-
between.

15. Overdrive Channel VOLUME control

This control adjusts the volume of the Overdrive

Channel. The louder you turn up this channel, the
‘looser’ your amp will sound and feel – especially
with the FDD switch (21) engaged. This behaviour
is exactly what a good all-valve amplifier does
and is a result of our proprietary FDD circuitry.

16. Digital FX PRESET / ADJUST control

This control serves a dual purpose. Not only

does it allow you to select one of the four types of
effects on offer (Chorus / Delay (CHR/DLY),
Delay (DLY), Chorus (CHR) or Flange (FLG)), it
also allows you to adjust a parameter as you
sweep it through each of the four effect segments.
The parameter you can adjust for each of the four
effect segments is shown below:

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Chorus

and Delay

(CHR/DLY)

Effect

Description

Adjustable Parameter

Delay Time

(from short to long as you turn the

Preset/Adjust control clockwise

through the CHR/DLY segment)

This multi-effect combines a lush, fixed speed

Chorus with a variable time Delay.

Delay
(DLY)

Delay Time

(from short to long as you turn the

Preset/Adjust control clockwise

through the DLY segment)

Short Delay Times will have less repeats for

‘groovy’ surf and rockabilly tones. Increasing the
Delay Time increases the number of repeats for a
much more atmospheric, ‘stadium’ effect.

Chorus

(CHR)

Speed

(from slow to fast as you turn the

Preset/Adjust control clockwise

through the CHR segment)

At slow Speeds a mellow, Phase-like sweep

occurs. As the Speed is increased a more
traditional chorus effect is heard. At maximum
Speed, a psychedelic vibrato results.

Flange

(FLG)

Speed

(from slow to fast as you turn the

Preset/Adjust control clockwise

through the FLG segment)

At slow Speed settings the amount of regeneration

is increased for huge ‘jet engine-like’ sweeps. As the
speed is increased the regeneration decreases to
produce a lush, natural sounding Flange effect. When
the Speed is maxed out, a fast vibrato results.

This manual is related to the following products:

MG100HDFX