MG
SERIES
50DFX
MG
SERIES
250DFX
Owners Manual
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WARNING! - Important safety instructions
WARNING: This apparatus must be earthed!
A. PLEASE read this instruction manual carefully before switching on.
!
B. ALWAYS use the supplied mains lead, if a replacement is required please contact your
authorised Marshall Dealer.
C. NEVER attempt to by-pass the fuses or fit ones of the incorrect value.
D. DO NOT attempt to remove the amplifier chassis, there are no user serviceable parts.
E. Refer all servicing to qualified service personnel.
From Jim Marshall
Servicing is required when the apparatus has been damaged in any way, such as when the
power supply cord or plug is damaged, liquid has been spilled or objects have fallen into the
apparatus, the apparatus has been exposed to rain or moisture, does not operate normally
or has been dropped.
I would like to personally thank you for selecting one of
my new MG range of combos – the MG50DFX 1x12" or the
stereo MG250DFX 2x12".
F. NEVER use an amplifier in damp or wet conditions. No objects filled with liquids should be placed
As a musician myself, I fully understand what it takes to
perform live in a band situation. In addition to talent,
on the apparatus.
dedication and a lot of hard work, you also need equipment
that will help you deliver the goods in each and every
G. ALWAYS unplug this apparatus during lightning storms or if unused for long periods of time.
playing situation you find yourself in. With this goal firmly in
mind, I set my experienced R&D team the task of designing
a new range of affordable MG amplifiers that will deliver the
tone you’re looking for at all volume levels – from quiet late
night practice to a full-blown live gig and all points in-between – in the way only a Marshall can.
H. PROTECT the power cord from being walked on or pinched particularly at plugs,
convenience receptacles and at the point where they exit from the apparatus.
I. DO NOT switch the amplifier on without the loudspeaker(s) connected.
➲
Note: This equipment has been tested and found to comply with the requirements of the EMC
Utilising groundbreaking new technologies, some of which were developed for our critically acclaimed
AVT range, the new MG Series raises the standard for what can be expected from a value-for-money
range of guitar amplifiers and defines a new benchmark. For example, the power amp section of your
new combo boasts FDD (Frequency Dependent Damping) – a radical new feature that is exclusive to
Marshall Amplification and accurately mimics the way our all-valve amplifiers interact with a
loudspeaker. As a direct result of FDD, your new MG50DFX/MG250DFX will give you a sound and feel
never before thought possible in such an affordable, non-valve amp.
directive (Environments E1, E2 and E3 EN 55103-1/2) and the Low Voltage directive in the E.U.
➲
EUROPE ONLY - Note: The Peak Inrush current for the MG50DFX is 9.6 amps. The Peak Inrush
current for the MG250DFX is 19.8 amps.
➲
CAUTION: Any changes or modifications not expressly approved by the party responsible for
compliance may void the users authority to operate the equipment.
➲
Note: It is recommended that all audio cables, with the exception of the speaker lead, used to
The DFX (Digital Effects) featured in both the MG50DFX and MG250DFX have been custom voiced
by our in-house digital effects experts. Each one of the five effect types on offer (Chorus/Delay, Delay,
Chorus, Flange and Reverb) have been designed to emulate the much sought after warmth and feel of
analogue effects, but in a highly flexible digital format. Furthermore, a wide range of variations for each
effect are quite literally at your fingertips – merely tweaking the three DFX controls (Preset/Adjust & FX
Level controls for the Chorus/Delay, Delay, Chorus and Flange options; and a separate Level control for
the Reverb) on the front panel, will give rise to sounds that range from subtle to radical, while always
remaining both natural and musical.
connect to the MG50DFX and MG250DFX are of a high quality screened type. These should not
exceed 10 metres in length.
Always use a non-screened Marshall approved speaker lead when connecting an extension cabinet to
these units.
➲ WARNING: Always ensure free movement of air around the amplifier!
USA ONLY - DO NOT defeat the purpose of the polarised or grounding type plug. A polarised
plug has two blades with one wider than the other. A grounding type plug has two blades and a
third grounding prong. The wide blade or the third prong are provided for your safety. When the
provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.
Like all the amplifiers in the new MG range, state-of-the-art manufacturing and stringent quality control
procedures ensure that these combos meet the high standard of build you have come to expect from all
Marshall products. The MG50DFX and MG250DFX were completely designed and engineered at my
Headquarters in Milton Keynes, England.
Whether the MG50DFX or MG250DFX is your first ever Marshall, or is the latest addition to your
arsenal of amps, the tone, flexibility and feel of these compact, rugged combos is guaranteed to deliver
the goods – from bedroom to backstage to onstage!
Follow all instructions and heed all warnings
KEEP THESE INSTRUCTIONS !
I wish you every success with your new Marshall. Welcome to the family...
Yours Sincerely,
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MG50DFX & MG250DFX Front Panel Features
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Note: When the Overdrive Channel is selected,
the OD LED (7) will light up red.
1. INPUT jack
Use a good quality guitar cable (i.e. one that’s
screened/shielded) to plug your guitar in here.
12. 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 (17) engaged. This behaviour
is exactly what a good all-valve amplifier does and is a result of our proprietary FDD circuitry.
7. OD LED
When illuminated, this LED indicates that the
Overdrive Channel has been selected by either the
Channel Select switch (6) or the supplied two-way
footswitch.
2. Clean Channel GAIN control
13. Digital FX PRESET / ADJUST control
When the Clean Channel is selected, this control
adjusts its volume. At low settings the sound will be
very clean with a pleasing, bell-like ring. Turning
this control above half way will introduce a
desirable, bluesy distortion as the power amplifier
stage is driven into ‘crunch mode’.
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:
8. 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.
Adjustable
Parameter
Effect
Description
3. 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 (17)
to produce deep sounding, valve-like clean tones that
are well defined yet still full and round.
Chorus and
Delay
(CHR/DLY)
Delay Time
This multi-effect combines a lush, fixed speed
Chorus with a variable time Delay.
(from short to long as you
turn the Preset/Adjust
control clockwise through
the CHR/DLY segment)
9. 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
(17) will allow you to dial in the exact amount of
low-end ‘thump’ and tightness you are looking for.
4. 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.
Delay (DLY)
Chorus (CHR)
Flange (FLG)
Delay Time
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.
(from short to long as you
turn the Preset/Adjust
control clockwise through
the DLY segment)
10. 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.
Speed
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.
5. Clean Channel TREBLE control
(from slow to fast as you
turn the Preset/Adjust
control clockwise through
the CHR segment)
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.
Speed
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.
11. Overdrive Channel TREBLE control
6. CHANNEL SELECT switch
(from slow to fast as you
turn the Preset/Adjust
control clockwise through
the FLG segment)
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.
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).
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14. Digital FX LEVEL control
18. EMULATED LINE OUT &
HEADPHONES jack
MG50DFX Rear Panel Features
This controls how much of the chosen effect
gets mixed in with your unaffected (dry) guitar
tone. Want to hear more of the DFX you’ve just
selected? Then simply turn this control up!
This jack can be used as either an Emulated
Line Out or as a Headphone output. This means
you can use this socket to connect your amp
directly to your multi-track recording machine
and you’ll get a great, speaker emulated guitar
sound direct to disk or tape. Alternatively you
can plug your headphones in here for a killer,
speaker-emulated sound!
Important Footswitch Note: Using the
supplied two-way footswitch, you can switch the
selected DFX on/off.
15. REVERB LEVEL control
This control lets you add a lush Reverb to your
sound – from a subtle hint to cavernous and all
points in-between. Designed by our in-house
digital experts, this custom designed Marshall
Reverb is highly musical and always sounds
natural – it never gets harsh or ‘fake’ sounding.
TIP: How to practise or record in ‘silence’:
The Clean Channel GAIN control (2) and the
Overdrive Channel VOLUME control (12) will
control the level of the headphone and line out.
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MG250DFX Rear Panel Features
The speaker output can be adjusted
independently using the Master VOLUME
control(16). Setting the Master VOLUME
control(16) to zero will allow silent recording or
practice.
Important Footswitch Note: The supplied
footswitch does NOT switch the Reverb on/off.
16. MASTER VOLUME control
19. POWER Switch & LED
As its name suggests, the Master Volume
control determines the overall volume of your
amplifier. So after setting-up the relative volume
of Channels 1 & 2 the overall level can be
adjusted without affecting your all-important
Clean/Overdrive balance.
The power switch turns your amplifier on and
off. The LED will be lit when your amplifier is on
and will not be lit when the amplifier is switched
off.
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Note: Before connecting to the mains
electricity supply, always ensure that your
amplifier is compatible with your electricity
supply, as detailed on the rear panel.
17. FDD (Frequency Dependent Damping)
switch
1. MAINS INPUT Connector
4. FX RETURN(s)
The MG amplifier is provided with a
detachable mains (power) lead which is
connected here. The specific mains input
voltage rating that your amplifier requires is
clearly indicated on the back panel. Before
connecting to the mains for the first time please
make sure that your amplifier is compatible with
your electricity supply.
This is where you connect the output of the
effects processor you are using in the effects
loop. As the MG250DFX is a stereo amplifier it
offers two FX Return jacks – LEFT and RIGHT.
This allows you to take full advantage of a
stereo effects processor. If, however, the
effects unit you are using only has a single,
mono output then use the LEFT (MONO) FX
Return.
Marshall’s proprietary FDD circuit accurately
mimics the way an all-valve amplifier interacts
with the loudspeaker(s) and adds a width and
depth to your sound which has been
unachievable in an affordable solid-state
amplifier... until now! To engage FDD simply
press this switch in.
Please ensure the amplifier is switched off and
unplugged from the mains electricity supply
before being moved.
2. LOUDSPEAKER Output(s)
The internal loudspeaker(s) connect here –
one in the case of the MG50DFX and two in the
case of the MG250DFX.
5. FX SEND
If you want to use an external effects
processor in your amp’s built-in Series effects
loop, this is the jack you connect to the INPUT
of the unit you are using. For optimum
performance, the FX loop is best suited for use
with a rack or multi-effects processor which has
a manual adjustment for INPUT SIGNAL
LEVEL.
Always use a non-screened Marshall
approved speaker lead when connecting an
extension cabinet to these units.
3. CD IN jack
If you want to jam to your favourite CD or
tape, merely connect the headphone output of
your CD or tape player here, adjust the CD
/tape player’s volume to match that of your
guitar and you’ve got the perfect ‘play-along’
practice system.
6. FOOTSWITCH
Connect the supplied two-way footswitch
here. Its left button (marked Channel) enables
you to change channels and its right button
(marked DFX) allows you to switch the DFX
Section on/off.
Important Footswitch Note: The supplied
footswitch does NOT switch the Reverb on/off.
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MG
MG
SERIES
SERIES
50DFX
250DFX
Technical Specification
Especificaciones técnicas
Technische Daten
Technical Specification
Especificaciones técnicas
Technische Daten
Caractéristiques techniques
Caractéristiques techniques
Power Output
50W RMS into 8Ω
Power Output
2 x 50W RMS into 8Ω
Potencia de salida
Ausgangsleistung
Puissance de sortie
50W RMS sobre 8Ω
50W RMS an 8Ω
Potencia de salida
Ausgangsleistung
Puissance de sortie
2 x 50W RMS sobre 8Ω
2 x 50W RMS an 8Ω
50W RMS sous 8 ohms
50W RMS / 8Ω
2 x 50W RMS sous 8 ohms
2 x 50W RMS / 8Ω
Main Guitar • Input Impedance
1MΩ
Main Guitar • Input Impedance
1MΩ
Impedancia de entrada principal de guitarra
Guitar • Input Eingangsimpedanz
Impédance d'entrée
1MΩ
1MΩ
1MΩ
1MΩ
Impedancia de entrada principal de guitarra
Guitar • Input Eingangsimpedanz
Impédance d'entrée
1MΩ
1MΩ
1MΩ
1MΩ
CD Input • Input impedance
CD Input • Input impedance
5.6kΩ
5.6kΩ
Impedancia de entrada de CD
CD Input • Eingangsimpedanz
Impédance d'entrée CD
5.6kΩ
5.6kΩ
5.6kΩ
5.6kΩ
Impedancia de entrada de CD
CD Input • Eingangsimpedanz
Impédance d'entrée CD
5.6kΩ
5.6kΩ
5.6kΩ
5.6kΩ
Emulated Output • Level
Emulated Output • Level
+4dBV Nom.
+4dBV Nom.
Nivel de salida de línea simulada
Emulated Output • Ausgangspegel
Niveau de sortie
+4dBV Nom.
+4dBV Nom.
+4dBV Nom.
+4dBV Nom.
Nivel de salida de línea simulada
Emulated Output • Ausgangspegel
Niveau de sortie
+4dBV Nom.
+4dBV Nom.
+4dBV Nom.
+4dBV Nom.
Weight
Weight
16kg
22kg
Peso
16kg
16kg
16kg
16kg
Peso
22kg
22kg
22kg
22kg
Gewicht
Poids
Gewicht
Poids
Size (mm)
Size (mm)
518mm x 498mm x 275mm
671mm x 498mm x 275mm
Tamaño (mm)
Maße (mm)
Taille (mm)
518mm x 498mm x 275mm
518mm x 498mm x 275mm
518mm x 498mm x 275mm
518mm x 498mm x 275mm
Tamaño (mm)
Maße (mm)
Taille (mm)
671mm x 498mm x 275mm
671mm x 498mm x 275mm
671mm x 498mm x 275mm
671mm x 498mm x 275mm
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