Includes free Jack to Jack cable.

The Marshall CODE 25 is a compact digital modelling guitar amplifier offering a wide selection of classic and modern Marshall-inspired sounds. Its 25-watt output and custom 10-inch speaker make it ideal for home practice, lessons, recording, songwriting and lower-volume rehearsals.

Powered by Marshall-Softube modelling technology, the CODE 25 allows different virtual preamps, power amplifiers and speaker cabinets to be combined. This gives players access to everything from articulate clean tones and vintage British crunch to saturated hard-rock and metal sounds.

With 100 editable presets, 24 built-in effects and Bluetooth connectivity, the CODE 25 provides a complete practice and sound-design platform without requiring a large pedalboard. Presets can be edited directly from the amplifier or wirelessly through the Marshall Gateway app.

At A Glance

Feature	Details
Brand	Marshall
Model	CODE 25
Series	CODE
Amplifier Type	Digital modelling guitar combo
Output Power	25 watts
Speaker	1 x 10-inch custom Marshall speaker
Speaker Rating	25W
Presets	100 editable presets
Built-In Effects	24 digital effects
Simultaneous Effects	Up to five
Modelling Technology	Marshall-Softube MST
Bluetooth	Audio streaming and app connectivity
App Control	Marshall Gateway
Auxiliary Input	Yes
Headphone Output	Yes
External Speaker Output	No
Condition	Brand New
Main Appeal	Extensive Marshall amp modelling and effects in a compact combo
Best For	Home practice, lessons, recording and lower-volume rehearsals
Skill Level	Beginner to advanced

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Why Choose the Marshall CODE 25?

Wide Range of Marshall Amplifier Sounds

The CODE 25 uses digital modelling to recreate a variety of classic and modern Marshall amplifier characteristics.

Rather than being limited to one fixed circuit, players can select different virtual preamps, power-amplifier stages and speaker cabinets. These components can be combined to create clean, crunch, vintage overdrive and modern high-gain sounds.

This flexibility makes the CODE 25 suitable for musicians who play several styles or want to experiment with different amplifier characters before committing to a larger traditional rig.

Marshall-Softube Modelling Technology

Marshall developed the CODE platform with audio-software specialist Softube.

Marshall-Softube modelling technology recreates the interaction between the selected preamp, power amplifier and speaker cabinet rather than applying a single distortion effect to every sound.

Changing one part of the virtual signal chain can alter the response, gain structure, midrange emphasis and overall feel of the preset.

100 Editable Presets

The CODE 25 contains 100 presets covering a broad range of musical styles and playing situations.

Factory presets provide immediate access to usable sounds, while every preset can be edited and stored. Players can create dedicated settings for different guitars, songs, practice routines and recording projects.

Preset storage also makes it easy to return to a favourite sound without manually rebuilding the amplifier and effect settings.

24 Built-In Digital Effects

The amplifier includes 24 digital effects covering the main categories used in modern guitar rigs.

Available processing includes pre-effects, modulation, delay and reverb. Up to five effects can be used simultaneously, allowing a complete virtual signal chain to be stored within each preset.

This provides plenty of creative scope for building subtle clean sounds, ambient textures, processed rhythm tones and effect-heavy lead settings.

Pre-Effects for Shaping the Guitar Signal

Pre-effects are positioned before the selected amplifier model and can influence how the virtual preamp responds.

These effects can be used to control dynamics, add additional drive or create more specialised sounds before the signal reaches the amplifier section.

This is similar to placing compressor, overdrive, distortion or filter pedals before a conventional guitar amplifier.

Modulation, Delay and Reverb

The modulation section adds movement and width to clean or driven guitar sounds.

Delay can create anything from subtle space to prominent rhythmic repeats, while reverb adds depth and ambience. These effects can be edited and stored independently within each preset.

Because they are built into the amplifier, no additional power supplies, patch cables or pedalboard space are required.

Bluetooth Audio Streaming

A compatible smartphone or tablet can be connected through Bluetooth.

Music, backing tracks, online lessons and practice material can then be streamed through the amplifier’s speaker. This makes it easy to play along with songs without connecting a separate audio system.

The guitar signal and streamed audio are reproduced together, allowing the relative levels to be balanced from the connected device and amplifier.

Marshall Gateway App

The Marshall Gateway app provides wireless control over the CODE 25 from a compatible iOS or Android device.

The app can be used to:

• Browse the amplifier’s presets

• Adjust gain and equalisation

• Select amplifier models

• Select power-amplifier models

• Change virtual speaker cabinets

• Add and edit effects

• Save personalised presets

• Organise a library of sounds

• Stream music through the amplifier

The amplifier remains fully usable from its physical controls when a phone or tablet is not connected.

CODE Presets Community

The CODE Presets platform allows players to explore sounds created by Marshall and other CODE users.

Downloaded presets can provide useful starting points for particular genres, playing techniques or artist-inspired tones. Personal sounds can also be stored and shared with other musicians.

This gives the CODE 25 additional creative potential beyond its original factory preset library.

Traditional Physical Controls

Despite its extensive digital features, the CODE 25 provides familiar Gain, Bass, Middle, Treble, Volume and Master controls.

These allow quick adjustments without navigating through the Gateway app. Dedicated buttons also provide access to the different stages of the virtual signal chain.

This combination of physical and app-based control makes the amplifier accessible to beginners while still offering detailed editing for more experienced players.

Custom 10-Inch Marshall Speaker

The CODE 25 is fitted with a custom 10-inch speaker rated at 25 watts.

The speaker provides a focused response suitable for home practice and recording while offering greater body than the smaller speakers found in many entry-level amplifiers.

Its compact cabinet keeps the amplifier portable and easy to position in a bedroom, teaching room or home studio.

Controllable Master Volume

The Master Volume adjusts the amplifier’s final output without changing the gain structure and stored level of the selected preset.

This allows the same core sound to be used at different listening volumes, making the CODE 25 practical for both quiet home practice and louder informal sessions.

Silent Headphone Practice

Compatible headphones can be connected through the 3.5mm headphone output.

Connecting headphones mutes the internal speaker, allowing presets and effects to be used without disturbing other people. This is especially useful for evening practice and shared living spaces.

Wired Auxiliary Input

A compatible phone, tablet, computer or audio player can also be connected through the 3.5mm auxiliary input.

This provides a wired alternative to Bluetooth for playing songs, backing tracks, lesson audio and metronomes through the amplifier.

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Why Choose a Digital Modelling Guitar Amplifier?

A digital modelling amplifier provides access to numerous amplifier and effect sounds from one compact unit.

Traditional guitar amplifiers usually have a particular circuit, gain range and tonal character. A modelling amplifier can recreate several different amplifier styles, making it easier to cover contrasting genres without owning multiple physical amplifiers.

Preset storage is particularly useful for learning and recording. Once a tone has been created, the entire sound can be saved and recalled later. This eliminates the need to photograph control settings or rebuild complicated effect chains.

Digital modelling also performs consistently at controlled listening levels. The CODE 25 can therefore produce detailed clean, crunch and distorted sounds without requiring the high output levels associated with a traditional valve amplifier.

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Who Is It For?

Beginner Guitarists

The factory presets allow new players to access a wide variety of usable tones immediately.

As their knowledge develops, they can begin adjusting individual amplifier models, cabinets, effects and EQ settings to understand how each part of a guitar rig influences the final sound.

Developing Players

The CODE 25 offers significantly more tonal flexibility than a basic two-channel practice amplifier.

Its editable presets provide room to experiment with different genres and build personalised sounds as playing ability improves.

Home Musicians

The compact dimensions, controllable output, Bluetooth streaming and headphone connection make it particularly well suited to bedrooms, flats and home studios.

Guitar Students

Backing tracks and lesson material can be streamed wirelessly or connected through the auxiliary input. Presets can also be organised around different exercises and musical styles.

Songwriters

The wide selection of amplifier and effect combinations makes it easy to explore how different tones influence riffs, chord progressions and arrangements.

Recording Musicians

Preset recall provides a consistent starting point when recording several sections of the same song or returning to an earlier project.

The compact combo can also be captured conventionally with a microphone for recording through its custom speaker.

Players Exploring Effects

The built-in effects provide an accessible way to learn how compression, drive, modulation, delay and reverb interact with different amplifier sounds.

Experienced Guitarists

More experienced musicians may find the CODE 25 useful as a portable home amplifier, backstage warm-up solution or compact secondary rig.

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What’s Included?

• Marshall CODE 25 digital modelling guitar combo amplifier

• Detachable UK mains cable

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Technical Specifications

Specification	Details
Product Type	Digital modelling guitar combo amplifier
Model	CODE 25
Series	Marshall CODE
Technology	Digital
Modelling System	Marshall-Softube MST
Output Power	25W
Presets	100 editable presets
Built-In Effects	24
Maximum Simultaneous Effects	5
Virtual Signal Chain	Pre-FX, preamp, power amplifier, speaker cabinet, modulation, delay and reverb
Instrument Input	1 x ¼-inch jack
Auxiliary Input	1 x 3.5mm jack
Headphone Output	1 x 3.5mm jack
Bluetooth	Audio streaming and Gateway app connectivity
App Compatibility	Marshall Gateway for compatible iOS and Android devices
Main Controls	Gain, Bass, Middle, Treble, Volume and Master
Preset Controls	Preset selector, Edit and Exit/Store
Modelling Controls	Pre-FX, Amp, Modulation, Delay, Reverb, Power and Cabinet
Effects Loop	No
External Speaker Output	No
Speaker Configuration	1 x 10-inch
Speaker Type	Custom Marshall speaker
Speaker Power Rating	25W
Speaker Impedance	4Ω
Amplifier Impedance	4Ω
Finish	Black
Width	350mm
Height	340mm
Depth	215mm
Weight	6.1kg
Designed and Engineered	United Kingdom
Country of Manufacture	Vietnam

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Power Requirements

The Marshall CODE 25 operates from UK mains power.

Connect the guitar and reduce the Master Volume before switching the amplifier on. Once a preset has been selected, gradually increase the Master control to a suitable listening level.

Its digital solid-state construction requires no valve warm-up period and no routine valve replacement.

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Creating a Personal Preset

Choose a Starting Sound

Select one of the 100 existing presets that is reasonably close to the required tone. Starting with a suitable preset can make the editing process quicker and easier.

Select the Amplifier Model

The amplifier model determines the core gain structure and tonal character.

Cleaner models provide greater clarity and dynamic range, while higher-gain models introduce more saturation, compression and sustain.

Adjust the Virtual Power Amplifier

The power-amplifier model changes the response and feel of the selected preamp.

Different selections can make the same basic preamp feel tighter, warmer, more aggressive or more dynamically responsive.

Choose a Speaker Cabinet Model

The cabinet model affects low-frequency depth, midrange emphasis and high-frequency character.

A smaller virtual cabinet may sound more direct and focused, while a larger configuration can add weight and projection.

Add Effects

Pre-effects can shape the signal before it reaches the amplifier model. Modulation, delay and reverb can then be used to complete the sound.

Refine the EQ

Bass, Middle and Treble controls allow the preset to be adapted to the guitar, pickups, room and playing style.

Balance the Preset Volume

Use the preset Volume control to balance the sound against other stored presets. The Master control can then adjust the overall amplifier output.

Store the Sound

Save the completed settings to the amplifier so they can be recalled during future practice, recording or rehearsal sessions.

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Comparison and Alternatives

Marshall CODE 50

The CODE 50 provides the same core modelling platform, 100 presets and 24 effects with a more powerful 50-watt output and larger 12-inch speaker.

Choose the CODE 25 for portability, home use and lower-volume practice. Choose the CODE 50 for additional projection, low-frequency depth and rehearsal capability.

Marshall MG15GFX

The MG15GFX provides four programmable channels with built-in modulation, delay and reverb effects.

It offers a more traditional amplifier-style approach, while the CODE 25 provides deeper editing through selectable preamps, power amplifiers and virtual speaker cabinets.

Marshall MG30GFX

The MG30GFX produces 30 watts through a 10-inch speaker and features four programmable channels.

Choose the MG30GFX for straightforward Marshall clean, crunch and overdrive tones. Choose the CODE 25 for a larger range of modelled amplifiers, cabinet combinations and downloadable presets.

Marshall DSL1CR

The DSL1CR is a compact all-valve combo offering Classic Gain and Ultra Gain channels.

Choose the DSL1CR for genuine low-wattage valve response and natural amplifier interaction. Choose the CODE 25 for broader tonal variety, Bluetooth connectivity and integrated effects.

Marshall MG10G

The MG10G is a simple two-channel practice amplifier with Clean and Overdrive sounds.

It is suitable for players wanting uncomplicated operation. The CODE 25 offers substantially greater sound-design potential and preset storage.

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Frequently Asked Questions

Does the Marshall CODE 25 require a smartphone?

No. Presets, models, effects and tone controls can all be accessed from the amplifier itself.

The Gateway app provides an alternative visual interface for wireless editing and preset management.

Can music be streamed through the amplifier?

Yes. A compatible device can stream music through Bluetooth. A wired audio device can also be connected through the auxiliary input.

Can every preset be edited?

Yes. The amplifier’s 100 presets can be adjusted and stored with personalised model, effect, gain, EQ and volume settings.

How many effects can be used simultaneously?

Up to five effects can be active within one preset.

Can I download additional sounds?

Yes. CODE Presets provides access to official and community-created sounds that can be added to a personal preset library.

Can I use the CODE 25 without the Gateway app?

Yes. The amplifier’s physical controls provide direct access to its main sound-shaping functions.

Does it work with conventional guitar pedals?

Yes. Standard tuners, wah pedals, compressors, overdrives, distortions and other effects can be connected between the guitar and amplifier input.

Does it have an effects loop?

No. External pedals are connected before the main instrument input.

Can an external speaker cabinet be connected?

No. The CODE 25 is designed to operate through its internal 10-inch speaker.

Can it be used for private practice?

Yes. Connecting compatible headphones mutes the built-in speaker.

Is the CODE 25 suitable for recording?

Yes. Its repeatable presets make it useful for recording consistent guitar sounds. The built-in speaker can also be captured using a suitable microphone.

Is it powerful enough for rehearsals?

The CODE 25 can handle lower-volume sessions and rehearsals. A higher-powered amplifier may provide better projection when playing alongside a loud acoustic drummer.

Can it be used for small performances?

It can be used for lower-volume performances and may be reinforced through a PA system by placing a microphone in front of the speaker.

Does it need valve maintenance?

No. The CODE 25 is a digital solid-state amplifier and contains no traditional amplifier valves requiring periodic replacement.

Can presets be backed up?

Presets can be managed through the Marshall Gateway and CODE Presets ecosystem, allowing personal sounds to be organised and synchronised.

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Fair Deal Music Verdict

★★★★★ 5/5

The Marshall CODE 25 is an excellent compact amplifier for players who want to explore a wide range of Marshall tones without investing in several amplifiers and effects pedals.

Its 100 editable presets, 24 built-in effects and flexible preamp, power-amplifier and cabinet modelling provide far more creative potential than a conventional beginner combo. Bluetooth streaming and Gateway app control also make it highly practical for modern home practice.

For beginners, developing players, songwriters and experienced guitarists needing a portable modelling amplifier, the CODE 25 offers impressive versatility in a compact 1x10 format.

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