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Unison Enabled

  • Overview
  • Features
  • Customer Reviews
  • 4.6/5

Regular Price: $199.00


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The legendary sound of rock, captured in all of its power and glory.

The undisputed alpha dog of rock and roll guitar amps, the Marshall 1959 Super Lead amplifier is as legendary as the music it helped create. From Jimi Hendrix to Jimmy Page to Eric Clapton, the “Plexi’s” punishing melange of snarl, sustain, smoothness, and raunch defined the sound of rock.

Developed by Softube — and available exclusively for UAD-2 hardware and Apollo audio interfaces — the Marshall Plexi Super Lead 1959 plug-in is not only an expert emulation of this 100-watt British classic, right down to its EL34 power tubes and hand-wired circuit, it offers uniquely powerful multi-mic sounds as well.

Use your Apollo with Unison™ technology to track through the only authentic Plexi Super Lead emulation — with no latency

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

Dial-in perfect studio amp tones with three different microphone combinations — FET, Valve, and Dynamic

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

UAD Tones & Techniques

Featuring the Marshall Plexi Super Lead 1959 plug-in

The Only Authentic Emulation of the Perfect Plexi

The Only Authentic Emulation of the Perfect Plexi

In an effort to capture the ultimate Plexi sound, Marshall offered the talented developers at Softube a bone-stock, pristine 1967 Super Lead from its own museum. Pairing it with an era-correct, broken-in Marshall 1960BHW 4x12 cabinet, Softube emulated all of the Super Lead’s idiosyncratic “ghost note” overtones, as well as the ability to “jump” the amp’s inputs to dial-in a wealth of high-powered tube tones.

Voiced by a Legend

Voiced by a Legend

Producer/engineer Tony Platt has recorded some of the most quintessential 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 simulations using his Platinum-approved, tried-and-true mic recipes. You can choose from 50 Platt-designed presets, or craft your own tones.

Mix Between Seven Expertly Placed Microphones

Mix Between Seven Expertly Placed Microphones

Open up the plug-in’s Channel Strip section, and easily dial-in your sounds with Panning, global High/Low EQ, and Level control over each microphone, allowing precision fine-tuning — during tracking or mixdown. No matter the genre, or type of guitar, you’re afforded tons of tweakable options, from pin-point single miked tones to roars of glorious room ambience.

Unison™ Technology for Authentic Plexi Tones

Unison™ Technology for Authentic Plexi 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 Plexi — a feature found only on Apollo audio interfaces.

Key Features

Faithful emulation of Marshall's own reference Plexi Super Lead amp, built in 1967, with an era-correct 1960BHW speaker cabinet
Microphone selections and placements by Tony Platt, captured in Kore Studios, London
Over 50 finely-tuned presets designed by AC/DC engineer Tony Platt
Three different microphone combinations available — FET, Valve, and Dynamic
Three separate mics per setting, two close and one room
Channel strip includes pans and volume faders for each mic, plus two band EQ

Amplifier Control Panel

On/Off switch: On or off
Presence knob: 0 to 10
Bass knob: 0 to 10
Middle knob: 0 to 10
Treble knob: 0 to 10
Volume I knob: 0 to 10
Volume II knob: 0 to 10
Inputs: Clicking on a Channel Input jack rotates between three options for each Channel Input
Ch 1 Low, + Ch 1 High patched to Ch 2 Low, + Ch 1 High patched to Ch 2 High
Ch 1 High, + Ch 1 Low patched to Ch 2 High, + Ch 1 Low patched to Ch 2 Low
Ch 2 Low, + Ch 2 High patched to Ch 1 Low, + Ch 2 High patched to Ch 1 High
Ch 2 High, + Ch 2 Low patched to Ch 1 High, + Ch 2 Low patched to Ch 1 Low

Channel Strip Panel

Equalizer Main Out Low: 200Hz to 0Hz Low Cut, 0 to +12 dB Low Shelf (bypass at 12 o’clock)
Equalizer Main Out High: -12 to +12 dB (bypass at 12 o’clock)
Main Out Volume: -∞ to +12 dB
Cabinet Microphone Select: Off, Valve, FET, Dynamic
Mic 1 Solo switch: On or Off
Mic 1 Pan knob: 100% L to 100% R
Mic 1 volume fader: -∞ to +12 dB
Mic 2 Solo switch: On or Off
Mic 2 Pan knob: 100% L to 100% R
Mic 2 volume fader: -∞ to +12 dB
Room Mic Solo switch: On or Off
Room Mic Pan knob: 100% L to 100% R
Room Mic volume fader: -∞ to +12 dB
Room Mic Pan knob: 100% L to 100% R
Room Mic volume fader: -∞ to +12 dB

Customer Reviews

Marshall® Plexi Super Lead 1959

Overall Rating


T. TzwSVsOw

May 9, 2024



T. TzwSVsOw

May 9, 2024



T. TzwSVsOw

May 9, 2024



M. Jarzebski

February 18, 2022

It is Marshall, but...

It is a classic sound, but I like it the clean way. Just before it breaks up there is a sound I love. All that channel strip makes a huge difference comparing to Classic which is a great plugin too. In unison it gives me everything I want and need. Honestly I prefer it to my real Plexi, but maybe I am getting older.

A. Fedyushkin

February 10, 2022

the only marshall amp i like

once i ve faced this amp while doing live sound back in london, was one of most vivid sonic experiences. of course i could not resist to have this color fo creative purposes. thanks.


January 19, 2022

Marshall® Plexi Super Lead 1959

A must have

F. Zaman

January 7, 2022

Utterly brilliant

I tried this with an EMG 81/60 loaded ESP and it was terrible. Plugged an old Strat straight into the HiZ with this thing on Unison and the entire universe collapsed and I was reborn again as a fish.

j. Vita

December 29, 2021

it's ok, but...

I agree with earlier reviewer that it sounds like a Marshall with old tubes - very loose and spongy sounding. Maybe offer ability to change power tubes and bias?

f. leprettre

September 30, 2021

que du bonheur

super réaliste les preset sont bon merci uad

R. Hortensius

September 20, 2021

Great Marshall tones !

Love the UAD Marshall Plexi !!!

g. Errico

August 19, 2021

Just like the Real One

I own the real 1959 and this plugin sound really good. Very close to the original.

D. Healey

July 24, 2021

Amazing dynamics - full stop!

This amp is so flexible and the dynamics available from the Softube amps is incredible. Like no other amp sims for me, especially in the unison slot. You can play soft and delicately and it’s clean and then pick hard to get more drive, literally so responsive. Superb!!

j. campos

April 3, 2021

You Should Have This

For $99 its crazy not to have this plug in if you're a guitarist. The modeling sounds great, the presets are awesome and the versatility is off the hook. You can disagree, but I'm too busy playing my guitar through this emulation to argue. Cheers

P. Lange

March 31, 2021

Marshall® Plexi Super Lead 1959

It's a Marshall, what else can I say? :)

L. Tastet

March 15, 2021



T. Duane

February 26, 2021

Own the real deal as well

I wanted to say this isn’t bad at all. Sounds great. The treble control can get a little grindy when it’s set too high- so it’s difficult to run everything at 10. So a good setting is bass lower than 5, treble at 5 or 6 and all else at 10. All these Marshall’s sound a bit diff and this is definitely useful. Per typical the real deal is better, but this is very convenient.

B. Webber

February 20, 2021

Voodoo Chile vibe

I love the character of the sound of this amp sim. It has that Voodoo Chile vibe. I have never owned a real plexi so I can’t vouch for its authenticity, but I can say that I really enjoy this plugin.

L. Pacheco

February 14, 2021

Own a Marshall Dsl40 and I don’t need it anymore

I was recording with a DSL40 and a Torpedo Captor with some really cool Celestion IR’s ( Creambacks) and this plug in does it better hahaha, I put a tube screamer before my Apollo twin and oh my god, This plug in takes it like a real amp, so don’t hesitate buy it’s amazing !!!!!

F. Wijers

February 14, 2021

a Great Plugin

it's sound very good .

D. Faggiolino

February 10, 2021


A must have with Unison!