Brainworx developed the bx_XL V2 to provide mastering engineers with the ability to deliver the loud mixes record labels demand without squashing the life out of the mix. bx_XL V2 uses M/S technology taken from their “modern classic” bx_digital V2 to convert stereo signals into M (mid / sum) and S (side / difference) signals. By splitting the M channel into 2 bands (high & low), you can limit and level control 3 individual channels (side, mid high, & mid low) to increase loudness while drastically improving the clarity of your stereo mixes— with far fewer distortion artifacts and much more punch than conventional two-channel limiters.

The Crossover Frequency slider determines the highest frequency affected by the mid low section. Use it to separate the kick drum so you can limit it differently from the rest of your mid signal. This is extremely useful for mixes that require powerful bottom end such as dance, rap, techno and rock.

After the 3 channels of bx_XL V2 have been mixed back into a stereo signal, an additional brick wall peak stop limiter offers an adjustable master out level. That’s 4 stages (or 5 channels…) of pro limiter for the ultimate loud and clear stereo mix!

The bx_XL V2 also includes a 3-band “psycho-acoustic” loudness maximizer, and a host of detailed Level meters, making it a sophisticated dynamics & loudness control system second to none.

The bx_XL V2 is designed to be the final plugin on the stereo master buss, making it the ideal companion to Brainworx’s bx_limiter plugin, which is designed for sub-groups and stems. However, you may find situations where the bx_XL V2, with its multiple limiting stages and other advanced features, is the right choice for stems and busses.

If you need to deliver LOUD mixes that aren’t squashed, download the bx_XL V2 today and give it a try. Like all Plugin Alliance products, it’s available for a full function 14-day demo, no dongle required!


  • M/S mastering limiter for stereo signals
  • 4 separate limiting stages
  • Multiple Solo, Auto Solo and Link features gives users precise control over all limiter stages
  • 2-band (Mid Low & Mid High) separated mid-processing
  • New X-Phase crossover filters
  • M/S stereo width control on any stereo channel
  • XL Saturation on board.
  • High volume masters that don´t sound squashed or distorted.
  • Automatable and supports copy and paste of parameters
  • 32 levels of undo/redo
  • Upgrade from bx_XL V1 available

Audio Examples

Industry Reviews

  • Richard Devine
    Richard Devine

    So far this is my favorite mastering limiter I have used. I am completely surprised how much volume I am able to get without crushing the dynamics out of my mixes. The M/S technology allows you to… Read More

  • X:144

    This is what brought it all together for me. It’s why I’m here at Plugin Alliance. This very plugin started it all. No more limiting the full bandwidth… I now can control the two bands over… Read More

Customer Reviews

  • ★★★★★
    bx_XL V2 - Amazing Limiter
    by JimGramze
    The bx_XL V2 Limiter is simply amazing. Basically I've finally found my mastering limiter. There are three bands of limiting: Mid-Lo, Mid-Hi, and side. Obviously this Mid/Side action separates the… Read More
    Plugin Alliance response
    Thank you Jim! Much appreciated.
  • ★★★★★
    bx_XL V2
    by Subterranean Howl Studios
    The XL is the plugin that brought my to brainworx/pluginaliance in the first place. The concept of MS was new to me at the time and so intriguing. I've had other mastering limiters before and since… Read More
  • ★★★★★
    Mastering tool
    by Alex Hepting
    On the xl v2 there is plenty of control for lower, mid and high bands. This could not only be used for mastering but also some creative applications. Usually mixing engineers struggle to get the low… Read More
  • ★★★★★
    Top !
    by JJBOT
    Je cherchais un plugin qui me permettrait de sonner fort sans provoquer de distorsion. Je suis satisfait du résultat, ce limiteur complet propose un ensemble d'outils permettant de sculpter le son… Read More
  • ★★★☆☆
    Bx_xl V2
    by martinitou
    As a mastering tool, or for the master bus on your mix, this plug-in is interesting. I don´t like the limiter module very much, though. I think it would be better to have the typical Out Ceiling and… Read More


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

Supported Operating Systems
Mac OS X 10.8 through 10.13
Windows 7 through 10
Pro Tools 10.3.10 or higher or any VST/VST3/AU-compatible host running on a supported operating system

Intel CPU only (minimum 2 GHz recommended)

Intel-compatible CPU with SSE2 instruction set (Pentium 4 compatible or higher; minimum 2 GHz recommended)

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. During this initial release, we at Plugin Alliance look forward to hearing the feedback of our valued customers, as your input will help shape future versions of this utility.