Diezel Herbert Amplifier

Diezel Herbert Amplifier

Unison Enabled


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(67 reviews)

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Vicious modern distortion combined with huge clean tones.

Diezel's Herbert amplifier is a 180-watt pulverizer designed to deliver the meanest of means, the cleanest of cleans — and more. Still considered state-of-the art, nearly 20 years after its release, the Diezel Herbert is a mainstay in heavy rock, and extreme metal productions — anywhere bold, powerful electric guitar tones are required.

Developed by Brainworx, and officially endorsed by legendary amp builder Peter Diezel, the Diezel Herbert plug-in masterfully emulates this six KT77-equipped sledgehammer, for UAD hardware and UA Audio Interfaces.

Now You Can:

Use your UA Interface to track through the Diezel Herbert — with no latency

Audition 120 separate high-end recording chains, featuring multiple cabinets and classic microphones

Shape tones further with FX Rack’s Vintage Delay, noise gate, high/low filters, and more

Easily dial in god-like clean tones, manicured medium gain, and all out assault with a state-of-the art tone machine

Take a Listen

Take a Listen
Pristine to Punishing

Pristine to Punishing

A contemporary tube amp if there ever was one, the Diezel Herbert plug-in thoroughly captures the hardware's cutting-edge circuit. From impossible-to-distort piano-like clean tones to searing early-VH textures, to absolutely groundbreaking extreme high-gain tones, the Diezel Herbert plug-in is the one-stop-shop for tracking bold, modern guitar tracks.

Diezel FX Rack

Diezel FX Rack

The Diezel Herbert plug-in offers additional control over your tones via the Brainworx FX Rack. It features a Noise Gate, switchable high and low-pass filters, and a Power Soak circuit that allows you to dial in as much overdrive as you want, without having to crank the output gain.

The Diezel Herbert also includes 120 impulse response Recording Chains that were perfectly captured from several boutique cabinets and recorded through Brainworx's vintage Neve console with an array of high-end and vintage microphones and outboard gear, giving you "record ready" tones, instantly.

Unison<sup>™</sup> Technology for UA Audio Interfaces

Unison Technology for UA Audio Interfaces

Harnessing UA’s groundbreaking Unison technology, the Diezel Herbert plug-in gives you the impedance, gain staging, and circuit behaviors that have contributed to making it the "King of Kings" in the world of modern tube amps.


Exacting emulation of the original Diezel Herbert 180-watt guitar amp

Endorsed and fully authenticated by Peter Diezel

120 Recording Chains with multiple speaker cabinets – recorded in Brainworx´s studio using the NEVE VXS72 console, stellar outboard gear and world class microphones

FX Rack features Vintage Delay, noise gate, filter controls, internal power soak, and pre– and post-amp bypass

Feels like a real amp when played through UA Audio Interface's Realtime UAD Processing

Physical input impedance and hands-on control of Gain staging with Unison technology

Customer Reviews

Diezel Herbert Amplifier

Overall Rating

(67 reviews)

E. Kocol

September 17, 2021


This thing rocks it just right.

s. fujimoto

June 12, 2021



B. Masters

June 11, 2021

Good for funky clean tones

I found some good low gain settings for funky blues rhythm guitar parts. I never intended to buy this plugin but once I demo'd it in Unison mode I have been using it continuously on several releases. It sounds like a real tube amp.

C. Lovely

April 17, 2021

Excellent Tone

I think this is the greatest digital amp I’ve ever heard. I use the Herbert plug with my own IR’s and I can’t tell a difference between mic’d cab and the plug-in. It’s truly so incredible, that I don’t even want to buy the actual hardware amp. Well done!

J. Slimp

February 12, 2021

My Fav New UAD Amp

I have almost all of the UAD amps and they are really good!

However this one I REALLY love. It’s heavy tones are amazing but it’s also versatile w clean and crunch style that are awesome as well.

Lastly the presets are really good. The Creamy Lead is beautiful!

Super happy with this purchase.

C. Santillo

January 24, 2021

Best high gain amp. Period.

Great tones, heavy distortiion, great sustain. Amazing amp.

C. Santillo

January 24, 2021

Best high gain amp. Period.

Great tones, heavy distortiion, great sustain. Amazing amp.

C. Santillo

January 24, 2021

Best high gain amp. Period.

Great tones, heavy distortiion, great sustain. Amazing amp.

UAD User

January 10, 2021

Must have!

Head and shoulders above any other amp sim I've tried. All bases covered with this bad boy!

佐. 怜

December 14, 2020



J. Slavin

November 7, 2020

Metal Heaven

I bought both Diezel amps, I’d buy them again, really nice

C. Fustos

October 1, 2020

Really great sound!

I purchased this plugin back in July and I can say that I really love the sound, what I can achieve with it. Highly recommend!

M. Blasquez

July 3, 2020

The high gain I selected (after auditioning all of them)

I had a VH-4 for a few years. Sounded great. Weighed a TON. But that amp sold me on Diezel. Never needed to hear the Herbert, since "I knew the VH-4". Checked the UA model of the VH-4. Yup, that's my amp. Then, tried the Herbert and... I don't know. It was just better. To me. Fender '55, Fuchs ODSD and this amp have me covered for anything I could want.

M. Jonsson

April 26, 2020

Diezel Herbert Amplifier

Thanks UA for this plugin. I was after the Alter Bridge type guitar sound for some songs I'm working on and this plugin was exactly what I needed.

D. Carlson

February 15, 2020

Sounds incredible!

Go ahead and buy it. You know you want to!

P. Enz

February 4, 2020

Very Nice Amplifier

The Diezel Amplifier has a very nice appealing sound with lots of high gain as well as crunch. It has a good noise gate and and many presets. It would be great to be able to switch the sounds on and off via midi foot-switch.

T. Fokas

February 4, 2020

Almost pulled the trigger on the VH4 (newest UAD plugin), but this just sounds way better

Even though the newer VH4 amp sim that Universal audio came out with was cheaper ($25 coupon didn’t work for this amp), I purchased this instead since it still sounded much better and not fizzy like the VH4. Between this and the ENGL Savage 120, pretty sure I’m covered for guitar amps.

S. Lednev

January 20, 2020

Like a real Herbert!

I used to have a real Diezel. Then he sold it, but very soon he missed it. Thanks to Universal Audio for the wonderful Diezel Herbert Amplifier plugin. It sounds really cool, like a real Herbert!

H. Mendez

January 12, 2020

Heavy, heavy

Purshase this one for some agresive sound, so fare i like it.

P. Sviyazov

January 9, 2020


Didn't expect sound like this from a plugin