Marshall Amplification owner manual MG50DFX & MG250DFX Front Panel Features, Chorus Delay Time

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MG50DFX & MG250DFX Front Panel Features

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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

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’.

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.

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.

5. 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.

6. 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).

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Note: When the Overdrive Channel is selected, the OD LED (7) will light up red.

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.

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.

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.

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.

11. 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.

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.

13. 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:

Effect

 

Adjustable

 

 

Description

 

Parameter

 

 

 

 

 

 

 

 

 

 

 

 

 

Chorus and

 

Delay Time

 

 

This multi-effect combines a lush, fixed speed

Delay

 

(from short to long as you

 

 

Chorus with a variable time Delay.

(CHR/DLY)

 

turn the Preset/Adjust

 

 

 

 

 

control clockwise through

 

 

 

 

 

the CHR/DLY segment)

 

 

 

 

 

 

 

 

 

Delay (DLY)

 

Delay Time

 

 

Short Delay Times will have less repeats for

 

 

(from short to long as you

 

 

‘groovy’ surf and rockabilly tones. Increasing the

 

 

turn the Preset/Adjust

 

 

Delay Time increases the number of repeats for a

 

 

control clockwise through

 

 

much more atmospheric, ‘stadium’ effect.

 

 

the DLY segment)

 

 

 

 

 

 

 

 

 

Chorus (CHR)

 

Speed

 

 

At slow Speeds a mellow, Phase-like sweep

 

 

(from slow to fast as you

 

 

occurs. As the Speed is increased a more

 

 

turn the Preset/Adjust

 

 

traditional chorus effect is heard. At maximum

 

 

control clockwise through

 

 

Speed, a psychedelic vibrato results.

 

 

the CHR segment)

 

 

 

 

 

 

 

 

 

Flange (FLG)

 

Speed

 

 

At slow Speed settings the amount of

 

 

(from slow to fast as you

 

 

regeneration is increased for huge ‘jet engine-

 

 

turn the Preset/Adjust

 

 

like’ sweeps. As the speed is increased the

 

 

control clockwise through

 

 

regeneration decreases to produce a lush,

 

 

the FLG segment)

 

 

natural sounding Flange effect. When the Speed

 

 

 

 

 

is maxed out, a fast vibrato results.

 

 

 

 

 

 

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Contents MGS E R I E S 50DFX MGS E R I E S 250DFX From Jim Marshall Refer all servicing to qualified service personnelChorus CHR Speed MG50DFX & MG250DFX Front Panel FeaturesChorus Delay Time Delay DLY Delay TimeDigital FX Level control FDD Frequency Dependent Damping switchPower Switch & LED Mains Input ConnectorMain Guitar Input Impedance Power OutputWeight 16kg Weight 22kgSuggested Settings

MG50DFX, MG250DFX specifications

Marshall Amplification has long been synonymous with legendary guitar tone, and the MG series, particularly the MG250DFX and MG50DFX, embodies this tradition while incorporating modern technologies for today's musicians. Both models are part of Marshall's solid-state amplifier line, offering reliability, versatility, and impressive sound quality tailored for all skill levels.

The MG250DFX is a powerful 250-watt amplifier head, perfect for larger venues and stage performances. It features four channels to cover a diverse range of tones: clean, crunch, overdrive, and a second overdrive. This allows guitarists to switch easily between sparkling clean sounds and high-gain distorted tones without missing a beat. Essential to the MG250DFX is its Digital FX processor, which provides a wide array of effects, including reverb, delay, and chorus, allowing musicians to enhance their sound in real-time.

On the other hand, the MG50DFX is a more compact option, boasting 50 watts of power, making it suitable for practice environments, smaller gigs, and home use. Like its larger counterpart, it features four channels for versatile tone shaping. Both models include a built-in speaker emulator, which ensures that players can achieve great tone even when using the headphone output or direct outputs for recording.

An important characteristic of both amplifiers is their user-friendly interface, featuring intuitive controls that allow musicians to dial in their perfect sound quickly. The MG series incorporates Marshall’s unique tone shaping circuit that gives users the ability to sculpt their tone with precision.

The MG250DFX and MG50DFX both come equipped with the innovative M-Gain system, which optimizes gain structure to improve response and enhance tonal clarity. Additionally, these amplifiers are designed to be highly portable, with lightweight construction and robust build quality, ensuring they can withstand the rigors of transport.

In summary, the Marshall MG250DFX and MG50DFX amplifiers represent a fusion of classic Marshall tone and modern technology, catering to a wide range of playing styles and preferences. Whether on stage or in the studio, these amplifiers deliver exceptional sound that bolsters a guitarist's performance. With their multiple channels, built-in effects, and versatile controls, they are powerful tools for any musician seeking to expand their sonic palette.