Overdrive Special Guitar Amplifier
Overdrive Special Guitar Amplifier
Overdrive Special Guitar Amplifier
Overdrive Special Guitar Amplifier
Overdrive Special Guitar Amplifier
Overdrive Special Guitar Amplifier

Overdrive Special Guitar Amplifier

Release version 1.0.1
Regular price$137.00

“The true pioneer of boutique amplifier”

Nembrini Audio Overdrive Special Guitar Amplifier plugin is based on a Overdrive Special By Dumble* schematic #124.

Nembrini Audio Overdrive Special s a two channel amplifier, which includes a clean channel and an “overdrive”channel.

The overdrive channel is described as “cascading” from the first channel into, at least, one additional gain stage in the overdrive channel. This means that the clean channel’s tone stack and gain stages will “cascade” into the gain stage of the overdrive channel, causing the clean channel to become “overdriven".


Nembrini Audio Overdrive Special features a 3-band equalizer and one volume control for both channels, but each channel has its own gain control.

The gain controls LEVEL and RATIO interact when the overdrive channel is engaged to allow a harmonic change in gain.


With Nembrini Audio Overdrive Special Guitar Amplifier is possible to choose between six different guitar cabinets, four microphone emulations with on/off axis position switch, continuous position and distance knobs. 

A complete Mixer section with SolosMutesPans and Faders allows you to blend together the two microphones with the ambience.


Impulse Loader lets you load up to three third-party impulse responses that you can even blend together using volume, pan, phase, solo and mute controls.

A useful browser window has been added so you can easily search through all your third-party IR files.  


Noise Gate section plus a Cleaner circuit to reduce rumbling and harshness is included


Legal Disclaimer:

Overdrive Special By Dumble is a registered trademark of Dumble. Nembrini Audio Overdrive Special was developed by Nembrini Audio SRL based on its own modelling techniques. Dumble has not endorsed nor sponsored the Nembrini Audio Overdrive Special in any manner, nor licensed any intellectual property for use in this product.


FREE iLok License Manager and iLok account needed.



Plugin Formats

A VST2, VST3, AAX or AudioUnits compatible host


An Intel compatible or Apple Silicon CPU 1GB RAM, Mac OS 10.9 or newer, Windows 7 or newer, 64-bit DAW

Customer Reviews

Based on 6 reviews
Milan Polak
Great sounds!

One of my go-to plugins when nothing else works...

Excellent amplifier

Versatile head to obtain more or less intense crunch, however you need to learn to adjust the controls well to obtain the desired nuances, the presets are just ideas to start defining the style.

David L’Abbée
Finally! I achieved my DREAM TONE (the ony i’ve been chasing for years!)

I’ve been a Nembrini Audio fan for a while now, since they all sound and feel amazing in every single aspect (gain texture, dynamics/sensitivity, frequencies, definition)

Being a solo studio artist making instrumental music, I’ve been on a quest for years to find MY OWN lead tone that would truly let speak my soul and allow me to use articulations, attack, softness/smoothness and gain texture in a single preset, without having to touch a knob. Here’s where the Overdrive Special comes into play and changes EVERYTHING! I finally got my DREAM TONE! I use it as my main amp for clean and crunch tones, combined with a few other plugins from different developpers for Stompboxes, Cab and Post-FX, in order to achieve ANY sound I have in mind. Here’s the true magic of a plugin rig. Just find YOUR amp, the one that feels 100% right to you (in my case, THIS ONE)… then try adding components from your other plugins that you already own to create a unique signal chain. Then, compare your new custom rig setup to any other amp sim suite endorsed by popular artists… and you’ll be blown away how better your custom rig will sound.. and feel!

This amp CUTS like a Marshall, CLEANS UP like a Fender, is SENSITIVE like a baby, and that makes you feel like you’re truly playing a tube amp. There’s no word to properly describe it… you GOT to TRY IT youself!!!

A very special THANK YOU to Igor Nembrini for giving me what I needed the most… now I feel inspired and creative like never before! ❤️🤩

Unique Clean Tones and Smooth Overdriven Tones!

The overdriven sounds never mask your guitar tones and it feels very touch sensitive. The cleans are quite unique: I can get great biting, grainy highs that remind me of plenty of 1960's garage bands. But disengage the Bright switch and you are back to a smooth Fender clean.

In an environment of heavy, extreme amp sims (I have a few), I love that Nembrini is making these vintage style amp sims. We need some more Fenders and Valcos please!

Mats Nermark
At last, the ODS in a plug-in

I've been a fan of a certain Dumble sound for a very long time. I remember seeing Dumbles onstage with Larry Carlton and Robben Ford and having heard them up close.

I've been able to find a few really good clones to profile but when it comes to finding "that sound" in a plug-in, I've been severely disappointed. Until now! Igor Nembrini has done an outstanding job with the NA Overdrive Special.

This amp is not a forgiving amp so if you make a mistake, you will hear it. But if you have your right hand touch under control then this amp will reward you with wonderful dynamics that is a joy to play with.

Id does take a while to get the topology of the amp since it's a bit different than the ordinary Fender or Marshall, but when you do, there are so many sounds to be had. The Mid control is very effective so you get a lot of variety from small adjustments, so until you get that right you may not get what you're after.

One important factor with this amp is the input control. If your guitar is a bit too hot for the clean sounds you need, then you just turn this down a bit. If you need more "juice" to get just a bit more overdrive you just turn it up until you're happy.

The speaker models are OK for most sounds, but if you want to use external IRs you can do that. And it's VERY easy to do. The IR browser is refreshingly simple and effective compared to most of the competition and you can load and mix up to three IRs.

Thanks Igor!

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