Available exclusively via Plugin Alliance, and enhanced by Brainworx with patent-pending TMT and more, we are happy to add this plugin to the growing line of Shadow Hills plugins. The Shadow Hills Mastering Compressor Class A Limited Edition is one of the most exclusive and powerful compressors ever built. Vintage King released the Class A in 2012, limiting production to only 50 units!

The VCA section is much punchier on this version. Brainworx added even more features to the emulation of the already modded hardware version. The RED version is punchier, faster and more versatile than the GREEN.

With the limited-edition Shadow Hills Industries included an updated Class A discrete compressor section utilizing Lundahl input transformers as well as hand wiring each compressor with Mogami Cable, an important factor when Brainworx Audio modeled one of these limited units as it gave the limited edition version a different character to the original.

During rigorous shoot-out tests against the Shadow Hills Industries Mastering Compressor, our pro audio engineers observed time and time again that the Class A features a smoother compression sound, punchier VCA, a more pronounced sonic dimension and overall larger size and perceived depth. Another interesting difference between the Shadow Hills Industries Mastering Compressor and the Class A version is that with the gain set to identical values on both units, the Class A version clocks in roughly 1 to 3 dBs higher, matching the emulated hardware and as a result, delivering a thicker and richer tone to whatever is running through it.

For this limited edition, Brainworx included its well-known retractable Extra Unit. The BX Extra Unit provides the following features: Brainworx´s TMT (patent pending Tolerance Modeling Technology), MS - processing, Mono-Maker, Stereo Width, Parallel Mix, Sidechain Filter continuously variable 12 dB per octave high pass filter and a Headroom parameter.

Visually, this version can also be distinguished by red LEDs on the front panel versus the green ones found on the Shadow Hills Mastering Compressor. GREEN for the Drum Buss - RED for the Master!

Upgrade for GREEN version owners: If you already own the green Shadow Hills Mastering Compressor you`ll get the new RED edition for $99.99

Added to the MEGA Bundle at no extra cost.


  • Exacting emulation of the original Class A limited edition of the Shadow Hills Mastering Compressor, endorsed by Shadow Hills Industries.
  • Class-A discrete compressor section
  • Separate Optical and Discrete compression sections for two-stage compression techniques.
  • Switchable Output Transformers  - Nickel, which adds a nice top - end sparkle. Iron, which adds a little character in the mid's, and Steel which adds additional harmonic distortion.
  • Brainworx Plugin Only Features added to the additional panel: Brainworx´s TMT, Headroom, M/S Processing, Mono-Maker, Stereo Width, Parallel Mix, Sidechain Filter, External Sidechain, Scalable User Interface.

Audio Examples

Industry Reviews

  • Michael Brauer

    Michael Brauer

    7 Grammy Awards (Coldplay, John Mayer, The Rolling Stones)

    I love my customized Shadow Hills Mastering Compressor, not only did Brainworx match it, but I have to admit, I wish it had all those extra cool features like the mono-maker, stereo width and the… Read More

  • Tue Madsen

    Tue Madsen

    Music Producer & Sound Engineer (Meshuggah, Dark Tranquillity, Suicide Silence)

    This is such a powerful tool for compression. Instantly worked its way into the mixes I am working on at the moment and made me go back to a few to put it in there too. Very nice and round feel,… Read More

  • Lucas (Luke) Pimentel

    Lucas (Luke) Pimentel

    Multi-Gold & Platinum Mastering Engineer

    Wow, just wow!! The New Version of the Shadow Hills Mastering Compressor has taken this tool to a whole different level. With TMT and M/S features alone, this emulation is now replacing other… Read More

  • Robert Venable

    Robert Venable

    Producer and Sound Engineer (Megadeth, Twenty One Pilots, Kelly Clarkson)

    This plugin gives you a spot-on emulation of the top-dollar mastering compressor we all know and love, but can do things that the original can't! The headroom adjustment abilities, as well as M/S… Read More

  • Michael Romanowski

    Michael Romanowski

    Alicia Keys, Kenny Wayne Shepherd, G-Love, Zigaboo Modeliste, Lady Gaga, Train, America, Too $hort

    The Shadow Hills Class A Mastering Compressor is a great new tool for my work. It has all of the vibe and sound from the previous version, with even more, and less. I like the addition of the… Read More

Customer Reviews

  • SHMC Red

    by Onesimus
    Saw that there was a discount for the SHMC Red because I already owned the green. I am certainly not disappointed! This Plugin has distinguished itself from anything I already own. I am still… Read More
  • Kick-ass

    by Elephantone
    I have the luck to own the hardware version of this plugin. A couple of years ago, while mixing remotely, i tried the UAD version of the plugin but wasn't too impressed.
    But yesterday, I… Read More
  • Sounds incredible

    by Psysword
    I got this humongous compressor and boy straight from the presets, it’s all guns firing. I’m no great engineer but it sure makes my bassline and mix such an extra thwack. My master is now not… Read More
  • Shadowhill the red one

    by Peter FROG
    I was already impressed by the classic green one. This one is even better, full of analog mojo. The best comp i've ever tried for mastering, but also so efficient on the drumbus that it has replaced… Read More
  • A+

    by Brougkr
    Best mastering compressor I have used to date. Sounds amazing no matter what you throw at it. Love to use the additional modes such as M/S, parallel, and monomaker on all of my work.


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.


Mastering Compressor Class A

Shadow Hills Mastering Compressor Class A - Changelog

Version 1.1 (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

Version 1.0 (Jan 13, 2020)
- Initial Release