Marshall® JMP 2203

Marshall® JMP 2203

Unison Enabled





The Marshall that redefined the
sound of rock — again.

Introduced in 1975, the Marshall JMP 2203 amplifier ushered in a new era of Marshall rock dominance. The JMP 2203 — which became the JCM800 in 1981 — offered varying degrees of intense, modern-sounding crunch and bold clean tones. Over the ensuing decades, the 2203 became a go-to for artists ranging from Jeff Beck and Andy Summers, to Tom Morello, Judas Priest, Slayer, and the Pixies’ Joey Santiago.

Developed by Softube — and available exclusively for UAD-2 hardware and Apollo audio interfaces — the Marshall JMP 2203 plug-in is a thorough emulation of this pioneering amp, down to its four EL34 power tubes and its sensitive, musical high-gain preamp. It also offers powerful multi-mic sounds for a range of professional studio tones.

Now You Can:

Use your Apollo with Unison™ technology to track through the only authentic Marshall JMP 2203 emulation — with no latency

Re-amp previously recorded tracks with any UAD-2 hardware

Dial-in perfect studio amp tones with two different mic channels and five different mic types

Fine-tune your guitar tones with 50 presets by legendary AC/DC engineer Tony Platt

Take A Listen

Take A Listen
UAD Tones & Techniques

UAD Tones & Techniques

Featuring the Marshall JMP 2203

Capturing the Ultimate JMP 2203

Capturing the Ultimate JMP 2203

To model the JMP 2203, Marshall loaned Softube’s engineers an original, all stock, 1977 JMP 2203 head from its own museum. Pairing it with a Marshall 1960B 4x12 equipped with Celestion GT12-75 speakers, Softube thoroughly emulated the original amp, right down to its touch-sensitive preamp section and crunchy 3-D clang.

Versatile Marshall Tones and More

Versatile Marshall Tones and More

The Marshall JMP 2203 plug-in expertly models one of the most sonically distinct Marshalls ever made. Its simple layout, High and Low sensitivity inputs, and dynamic preamp offers a ton of textures, from dense distortion to powerful, attitude-laden clean/crunch sounds.

Voiced by a Legend

Voiced by a Legend

Producer/engineer Tony Platt has recorded some of the most classic Marshall tones ever committed to tape — most notably AC/DC’s landmark albums, Highway to Hell and Back in Black. Softube enlisted Platt to capture exquisite cabinet and microphone placements using his Platinum-approved, tried-and-true mic recipes. You can choose from 50 Platt-designed presets, or craft your own tones.

Mix Between Two Expertly Placed Microphones

Mix Between Two Expertly Placed Microphones

Open up the plug-in’s Channel Strip section, and easily dial-in your sounds with a two channel mixer with five essential microphone options per channel. Along with individual Pan and Volume controls for each channel, you can tweak your tones further with global Input Gate, and three-band EQ with sweepable mids.

Unison™ Technology for Authentic JMP 2203 Tones

Unison™ Technology for Authentic JMP 2203 Tones

The interaction of your guitar’s pickups to an amp’s front end is crucial to capturing the tone and feel of the amplifier. With UA’s Unison technology, Apollo user's guitar pickups will see the exact impedance load as if they’re plugged into a vintage Marshall 2203 amplifier — a feature found only on Apollo audio interfaces.

Key Features

Faithful emulation of Marshall's own reference JMP 2203 amp, built in 1977
Custom presets, microphone selections, and placements by Tony Platt, captured in Strongroom Studios, London
Two channel mic mixer with five essential microphone options per channel
Channel strip includes pan and volume faders for each mic, input gate, and three band EQ with sweepable Mid
Physical input impedance and hands-on control of Gain staging with Unison technology


Marshall® JMP 2203 プラグイン

A. Kuehne


Liefert genau das was ich wollte

Wow... bin begeistert. Apollo twin und UAD Marshall 2203! Ohne lange zu probieren bekomme ich den Ton, den ich von einem guten plug-in erwarte! Thanks softube und UAD!!

U. Borjesson


Another amp in the studio.

As all the other Marshalls you want this one. If you use (of course you do:-)) an Apollo interface with the Hi/Z input and this amp in the Unison slot you can be stucked for hours just playing because of it is like playing the real thing.
I always , record with wet sound into DAW as in areal studio with a real hardware amp, you set the sound that suits the track and plays, this happens with the Unison Marshalls you becomes a musician, which is way we all starts in the beginning.
Buy this plug and an Apollo interface.

S. Woolgar


Mostly happy

I am still learning to dial it in, and I don't actually know whether it sounds just like the original or not. I am happy with the sound it puts out, although I still need to learn how to dial it in.

That being said, it takes a HUGE amount of the DSP. I pretty much can't use it on my Twin unless I am happy having nothing else in the chain. If I want to use this, I need to use it on my QUAD.

D. Bires


Sorry but not sold on this one UA!

Downloaded the demo. To me the silver Jubilee was is a smash hit but the jmp 2203 left me scratching my head. First off some of the stock adjustment sounds were either to flat and bassy or way to brittle and high endy and some of these tones left my ears ringing at low volumes. Not sure why. On the other hand I did manage to dial in so alright tones by messing with the mics and knob settings. The filter cut is pretty cool and you will need it especially if you decide to use some of the stock tones. If guitars sounded this bad in the 80's I am lost for words. Well hopefully UA will model a mesa of some sort in the future. I really dont think they will be able to top the Jubilee. I was generous with 3 stars.



Insanely good 2203 - the spirit of Marshall

Hi there,

stumbled on the new Marshall 2203 plugin, and since I already have the other Marshall plugins it was an easy decision to buy it.

So, downloaded and plugged in my '79 Custom and lo and behold - its a really insane plugin which nails the 2203 sound and also is a great tool for experimenting with settings (incl all 10's) and mic combinations. I own an original 2203 from 1978 which I bought new in London and have played ever since, in my case through a late 70's 1960A with Celestion G12-65's, and copying my settings gives me a very accurate tone and response from the plugin. In my experience the G12-65 is a bit more "open" than the G12-75, which is also emulated accurately.

After only 30 minutes I am absolutely sold on this one!

M. Niemczyk


Great Sound - Missing bypass pre amp feature!

A nice sounding simulation BUT - where is the bypass pre amp feature from the ENGL amps?
This simulation is really a great one but real tube pre amps has still a greater dynamic range. Thats why the best results can be only achieved with the combination of real preamp and power amp, cabinet microphones simulation (at least in a neighbor friendly environment).
Its so sorry that SoftTube didn't provide one additional switch to turn of the preamp section ;(



Realistic amp sound!!

I've used a lot of amp simulators, but the plug-in really felt like it was actually playing. It showed complete responsiveness from clean tones to drive tones, similar to the real thing and no longer had to struggle with mic in the studio. Make sure to buy other users home recording

A. Zuppelli


My favorite Marshall amp, but please let Unison active at amp stanby!

I have bought this Amp after demoing it for all the 14 days, and I must say that I love this Marshall, this is my favorite one. Very edgy , brilliant and responsive. When I put the amp gain "at the sweet spot", guitar volume pot variation reacts the same like using a real amp. Incredible job done.
Not giving 5 stars (like the Marshall Legend bundle that I bought too), only because I hope you add Full Unison support like the Fender amp behaviour: Unison should stay on at amp bypass like on the Fender, instead of switching off .
If we put one instance bypassed in Unison slot and track the amp in stereo through the Aux channel, this could let the Unison technology pass thru and, at the same time, we could also benefit of the sweet stereo mics placement.

N. Kim



Simply, perfectly, Natural

J. Callahan



This amp sounds absolutely fantastic while running in Unison! It really does respond like a real tube amp, the only difference is the lack of a shaking ground, which I'm fine with since the sound is great!

d. entz



it is what it is.

P. Christian



I have the real deal a 78 jmp 2203 it's been a part of my sound for years now.i know that amp inside and out,but I have to say this sick. I get all the great sound and tone of this classic amp ,amazing control ,and speed for set up. I can dial in my tone with the plug in and reamp later.

N. Karkour



As a Flamenco Brazilian Classical Electric guitarist this amp sounds as good as you have it live. To hear the proof check my recordings

G. Atkins


Getting "The Metal Guitar Sound"

I love the Marshall JMP 2203 plugin. On a recent project the guitar tracks I was sent sounded just ok. I really wanted to boost these tracks so that they had the “real punch and grit that to me define a metal song”. That’s when I put the Marshall JMP 2203 plugin into action, I could really work with the guitars and hear how they sounded soloed and then in the mix. Next time instead of spending hours to re-track the part I will go to this plugin first. UAD continues to make my job easier.

L. Pauselli


Marshall Jmp 2203

The best simulation who I heard, simple, very powerful, with incredible feeling!
I think 4 stars because there is a choosy frequency...I hope they'll fix it.

V. Kozhin


Marshall JMP 2203

Great bright sound! It's good for my Fender start I get really funky style tone. And it's good for jazzy tone.

o. Millot


One Word!

I use it all the time!

D. Webb


Marshall JMP2203

The JMP2203 was my first choice of the Marshall amps. The modeling is EXCELLENT! The choice and adjustments of the microphones along with the provided EQ and Gate make this plugin absolutely FANTASTIC! UAD folks, Thank You for the labor of love and time you invested in this plugin. It truly is one of my favorites,

J. Sidelinger


Nailed it

The Marshall 2203 is the base of my personal guitar tone and has been for many years. The problem is if you aren't on stage or in a band rehearsal situation, a 2203 is way too much amp. This leads to a whole lot of compromises with personal practice and digital recording- until now. To me this plugin not only has the exact sound of the Marshall 2203 circuit, but also the feel and response. Like a real 2203, all the characteristics of your guitar and playing (good or bad) are brought to the fore. Unlike any other amp plugin I've tried, this one sounds great on its own with no EQ or effects needed, and that saying a lot. Well done!

S. Tanner


A very nice emulation

I am very pleased with this plug-in. I can use it for many different things and so.

But for me I personally like the Marshall Silver Jubilee 2555 plug-in even a Little bit better for my style.