Fully endorsed and approved by Mäag Audio. Modeled by Brainworx.

The original MAGNUM-K™ hardware is a single-channel Compressor built to complement the audio engineer’s craft. It is comprised of two serial compressor sections (MAGNUM COMP and K COMP), a very musical Parallel EQ (with LMF and Mäag's signature AIR BAND®), plus a Soft Limit (soft limiter).

In cooperation with Brainworx this design was turned into a convincing plugin, whereas the concept was taken to the next level. BX added L/R and M/S Stereo capabilities, injected 20 different, analog channels utilizing their patent-pending TMT (Tolerance Modeling Technology) and several convenient plugin-only features like M/S Stereo Width, Mono-Maker etc.

Whether putting the finishing touches on a 2-mix or making a vocal sound bigger than life without taking your head off; the MAGNUM-K will help elevate your craft.

Welcome to compression nirvana and sonic bliss. Welcome to the Mäag Audio MAGNUM-K Compressor where bigger sound, quicker workflow, and outstanding control were designed to help you achieve your audio goals.


The MAGNUM-K Compressor helps quieter sonic signatures become as big as you want them to be while simultaneously reigning in those louder, more dominant tones.


Tuning a MAGNUM-K Compressor is quick and easy, reducing your overall workflow time.


The MAGNUM-K offers outstanding control from its transparent INPUT ATTN (attenuator) and INPUT GAIN controls, to its SIDECHAIN capabilities and MAKEUP GAIN. 


The Mäag MAGNUM-K offers 20 different channels, made possible by TMT.

TMT takes the real-world tolerances of audio components found in audio circuits into account and offers various channels of analog audio which have realistic variances in frequency response, time constants in dynamic sections, etc.

TMT is the same ground-breaking technology that can be found in the console emulations by Brainworx (SSL 4000 E & G, for example).

The result is digital audio that sounds as analog as possible, whereas even the L/R channels of a stereo instance will react slightly different, giving you wide and realistic analog sound in your computer! 


  • 2 compressor sections, Magnum Comp and K Comp
  • Musical-sounding parallel EQ with LMF and Mäag's signature Air Band
  • Soft Limiter
  • Faithfully modelled, endorsed and approved by Mäag Audio
  • Stereo version in addition to the original mono version
  • DRY/WET parameter for parallel mix
  • 20 different, analog  TMT channels
  • M/S mode inclusive Solo M and Solo S

Audio Examples

Industry Reviews

  • Dave Pensado

    Dave Pensado

    Grammy Winning Mix Engineer/Host of Pensado’s Place (Michael Jackson, Kelly Clarkson, Christina Aguilera, Beyonce)

    The MAGNUM K plugin is a true Innovation in dynamics. Modeled after the hardware of the same name it is a necessary piece of gear in every engineers rack. The plugin version also has MS, width and… Read More

  • F. Reid Shippen

    F. Reid Shippen

    Death Cab for Cutie, Backstreet Boys, Disney

    The MAGNUM is the miracle for your mix buss- the perfect high/low end eq and a limiter to die for... i can’t imagine not using this forever.

  • Andy Bradfield

    Andy Bradfield

    The Magnum K is as Butter smooth as the EQ4 that went before This is a mastering plug in that would be equally at home on a drum bus or vocal chanel I thought it wasn’t doing much - then i… Read More

  • Ralf Hildenbeutel

    Ralf Hildenbeutel

    Producer / Artist / Musician

    The Maag Magnum K immediately worked for me, I used it on a stereo mix as well as on busses, the “opening” effect was great and the mix got really big. As a fan of Maag´s EQ’s, especially… Read More

  • Audio Militia Studios

    Audio Militia Studios

    We love the depth we can get in M/S compression and that typical Maag weight and Sparkle we can add with the EQ .Brainworx have done it again another beast of an emulation with flawless detail.

Customer Reviews

  • Nice so far

    by Paul
    GUI is a tad small but hopefully PA will add scaling to all the Maags. Obviously what matters is the sound and I like the sound of this plugin: compressor is good and top end air Q is great,
  • Great Compressor but Gain Staging Needs Improvement!

    by Qluster
    This sounds great, especially when used on the mix buss. I tend to struggle making use for it on single instruments or less busy busses though unfortunately as the input gain staging feels a bit off… Read More
  • Mäag compressor

    by Kale
    Holy freakin cows this thing is a mister, I love it.. VERY effective on drums and instruments, even vocals
  • Killer comp

    by Psysword
    This is my secret weapon on drums, vocals, and mastering. You cant go wrong with this puppy. The power and ease of the air added, and the EQ, are simply amazing. I love this compressor and the only… Read More
  • Fantastic-sounding plugin with dated GUI/control issues.

    by In-Stereo
    This is a common issue for Plugin Alliance that completely baffles me: A wonderful sounding plugin that stays stuck in the past with some of its GUI and feature set.
    The good: The Magnum-K is a… Read More


Supported Plugin Formats
AAX DSP, AAX Native, AU, AAX AudioSuite, VST2, VST3

Supported Operating Systems
macOS 10.9 through 10.15
Windows 7 through 10

Intel CPU only (minimum 2 GHz recommended)

x64-compatible CPU

System Requirements
Display resolution: 1440 × 900px or 1280 × 960px or higher
Memory: 2 GB RAM


With the Installation Manager, you can select, download and install just the Plugin Alliance products and formats you need for your system.



Maag Magnum-K - Changelog

Version 1.3 (May 27, 2020)
- General: Qualified for use with the Windows 10 May 2020 Update
- General: VST3: Fixed potential hangs in a DAW upon loading
- General: Fixed logical issues in undo / redo behavior
- General: Fixed UI resizing issues in Ableton Live on Windows
- General: Fixed audio processing initialization issues on amp and delay products
- Fixed possible DC pop at rendering audio

Version 1.2 (Nov 06, 2019)
- General: Qualified for use with macOS 10.15 Catalina
- General: Qualified for use with Windows 10 November 2019 Update
- General: Fixed plugin validation in Logic under macOS Catalina
- General: Fixed preset name restore in Logic when reopening a session
- General: Fixed opening authorization dialog triggering automation
- General: Improved instantiation times for plugins
- General: Improved license functionality and branding for subscription
- General: Removed 32-bit support on macOS and Windows
- Fixed returning to default for balance and correlation

Version 1.1 (Jul 10, 2019)
- General: macOS 10.14.5 Update compatibility
- General: Windows 10 1903 Update compatibility
- General: Fixed activation issue in Windows hosts set to non-English language (e.g. Cakewalk)
- General: AU: Fixed issue with increased CPU and memory on reopening UI
- General: VST3: Fixed issue with adapting to host knob mode, and now prioritizing linear
- General: VST3: Fixed issue with VST3 preset permissions
- General: VST3: Improved synchronization between parameter states and some UI functions, e.g. toolbar reset

Version 1.0 (Jan 22, 2019)
- Initial release