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 patented TMT (Tolerance Modeling Technology, US Patent No. 10,725,727) 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 (US Patent No. 10,725,727) 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
  • TMT — Brainworx patent-registered “Tolerance Modeling Technology” (US Patent No. 10,725,727)
  • 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

    10 Grammy Awards (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

  • Versatile with a Blue Flavor

    by Ne10
    I am amazed by the quality and the versatility of the Magnum-K. It has a unique sound that is perfect for bus compression and mastering. Even on a track by track basis. The K-Comp helps with taming… Read More

    by Woodboy
    What a great Chanel. Simple and effective on the BUSSES ..!
    Great Job BW
  • Una bestia

    by Pablo Fiore
    Y si y entendí cuando lo probé hace tiempo del porque el nombre Magnum ajajajaj, y un compresor que incluya un ecualizador así de musical? Es algo muy loco, tiene todo me encanta, muy musical y… Read More
  • Un must to have pour le mastering

    by ABC du beatmaking
    J'aimais beaucoup le maag eq2&4 vraiment pratique et musical et le compresseur magnum k est vraiment complet et capable de tout faire je l utilise sur tout mes masters il apporte une bonne gestion de… Read More
  • Maagic

    by Bob Yordan
    Abracadabra workflow maagic, my new goto pluginand it sounds really great. :-)


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

Supported Operating Systems
macOS 14 down to macOS 11
Windows 11 down to Windows 10

Intel, or Apple Silicon

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 & install all the Plugin Alliance products. Select any and all formats you need for your system! Mac & PC.



Maag Magnum-K - Changelog

Version 1.6.1 (Oct 9, 2023)
- General: fixed CPU spikes on Mac OS

Version 1.6.0 (Aug 15, 2023)
- General: added native Apple Silicon compatibility for AAX
- General: added macOS Ventura support
- General: improved plugin loading time in the DAW
- General: fixed issue causing Logic to crash when closing the plugin UI
- General: improved font drawing behavior

Version 1.5.1 (Mar 21, 2022)
- Fixed incorrect metering behavior

Version 1.5 (Mar 15, 2022)
- General: added native Apple Silicon compatibility for VST3, VST2 and AU
- General: added macOS Monterey support
- General: added Windows 11 and Windows 10 21H1 support
- General: discontinued Windows 7 support
- General: discontinued macOS 10.9 and 10.11 support
- General: fixed metering behavior in block sizes of 2048 samples and higher

Version 1.4 (Mar 22, 2021)
- General: Compatibility with Logic on Apple Silicon devices via the Rosetta-2 layer
- General: Fixed possible artefacts when freezing or bouncing tracks in Pro Tools
- General: Fixed automation highlighting disappearing in Studio One
- General: Improved license dialog visibility in dark mode

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