FabFilter Pro-MB Plug-in

Multiband Compressor/Expander Plug-in with Up to 6 Processing Bands and Dynamic Phase, Linear Phase, and Minimum Phase Modes - Mac/PC AAX Native, RTAS, VST, VST3, AU, AudioSuite
FabFilter Pro-MB Plug-in image 1
FabFilter Pro-MB Plug-in image 1
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Compatible with:


Software Compatibility

Most software is compatible with both Mac and Windows computers, but check to make sure.

If you're using Pro Tools, AAX plug-ins (or RTAS for older versions) are what you need. Most other Mac DAWs support AU plug-ins. VST is compatible with a number of Mac and Windows programs. Be sure you choose plug-ins that work with your DAW!

To learn more about software compatibility, check out our buying guide.

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FabFilter Pro-MB Plug-in
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This Plug-in Makes Multiband Compression Easy

FabFilter Pro-MB is a robust multiband compressor/expander plug-in with all the expert features you need, combining exceptional sound quality with great interface workflow. At Sweetwater, we take compression seriously - so seriously, in fact, that many of us use multiband compression on a daily basis. Now, granted - it's a powerful tool with a reputation for being notoriously difficult to set up and control, but FabFilter has jumped the learning curve with Pro-MB's intuitive, user-friendly interface that lets you effortlessly conquer the beast.

FabFilter Pro-MB Compressor/Expander Plug-in at a Glance:
  • Think bands - not crossovers!
  • Multiple compression modes, for superior results with minimum fuss
Think bands - not crossovers!

As opposed to splitting the entire spectrum with crossovers - the way most multibands work, Pro-MB lets you directly create a new band at the frequency range you want to work on. Easy peasy! The cool multiband display clearly shows the rest of the spectrum as untouched. And if you so desire, you can easily snap bands together to re-create a traditional crossover system. Naturally, you also get the usual packet of FabFilter goodies, including precision-tuned controls, MIDI Learn, Smart Parameter Interpolation for smooth parameter transitions, and more.

Multiple compression modes, for superior results with minimum fuss

FabFilter Pro-MB features a unique Dynamic Phase processing mode with the same frequency response as traditional multiband processing, but it only introduces minor phase changes when the gain actually changes - without any latency or pre-ringing. Pro-MB also includes a highly effective Linear Phase mode, as well as the traditional Minimum Phase mode. Take it from us, the potent combination of high-quality processing and juiced workflow using Pro-MB's interactive multiband display and expert features is going to make you a multiband compression wizard.

FabFilter Pro-MB Compressor/Expander Plug-in Features at a Glance:
  • Up to six processing bands, freely placed anywhere in the spectrum
  • Bands can be easily snapped together to form a traditional crossover system
  • Unique Dynamic Phase processing mode featuring zero latency, no static phase changes and no pre-ringing artifacts
  • Excellent Linear Phase processing mode, eliminating audible artifacts when quickly changing crossover frequencies
  • Minimum Phase processing mode
  • Handles any form of dynamics processing:
    • from highly transparent compression, limiting and expansion
    • to pumping, upward compression and punchy gating
  • Fully customizable per band:
    • Threshold, range, attack, release, output gain, ratio, variable knee, and lookahead (up to 20 ms)
    • Variable stereo linking, mid- or side-only processing, external side chain input
    • Triggering on a separate frequency range
  • Steepness of each crossover slope can be freely adjusted between 6dB/oct and 48dB/oct
  • Intelligent, highly program- and frequency-dependent attack and release curves
  • Global dry/wet mix from 0% to 200% to easily scale the total effect of the plug-in
  • Unique interactive multiband display, designed for an optimal workflow
  • Accurate and smooth real-time frequency analyzer with pre- and post-processing options and 'freeze' feature
  • High-quality audio processing algorithms with 64-bit internal processing where needed
  • Up to four times linear-phase oversampling
  • Band solo/mute and bypass options
  • Precise output metering
  • GPU-powered graphics acceleration
  • Double-click text entry of parameter values
  • Stereo and mono plug-ins available
  • Supports common Pro Tools hardware control surfaces
  • MIDI Learn
  • Undo/redo and A/B comparison
  • Smart Parameter Interpolation
  • Sample-accurate automation of all parameters
  • Extensive help file with interactive help hints
Be a multiband compression wizard, with FabFilter Pro-MB!

Tech Specs

Software Type Compressor
Platform Mac, PC
Upgrade/Full Full
Download/Boxed Download
Bit Depth AAX Native, RTAS, VST, VST3, AU, AudioSuite (32-bit), AAX Native, VST, VST3, AU, AudioSuite (64-bit)
Format AAX Native, RTAS, VST, VST3, AU, AudioSuite
Hardware Requirements - Mac Intel Processor
OS Requirements - Mac OS X 10.5 (32-bit)/OS X 10.6 (64-bit)
OS Requirements - PC Windows XP (32-bit)/Windows Vista (64-bit, X64)
Manufacturer Part Number 11-30170

Customer Reviews

Based on 3 reviews
Write your review

As useful a tool as I have used

Like the title says, this is an amazingly useful tool. From tightening up the lows on a bass, punching up a kick, controlling a splashy hat, or getting an acoustic to sit right under vocals, etc etc etc, Pro-MB makes it easy! I have yet to plumb the depths of all the functionality (and there is a ton of it), but straight out of the box, it was easy to use and understand. Added bonus, it sounds very natural even when pushed hard. It can be hard to justify plugin purchases sometimes, but not with the Pro-MB, I find myself tackling issues I would have never though to use a multiband comp for. Happy!


Very easy to use with pinpoint accuracy
Music background: Bass player. Singer/songwriter/producer


I have this and the Fab-Filter Pro Q.. With these two plugs, you can do some serious shaping with basically no coloration and definitely no artifacts. If you're running your signal through thousands of dollars of hardware, why color your sound or risk artifacts with plugins that cost a few hundred? Seems weird to me... Unless you use the UA plugs.. Anyway, the Pro-MB might be the most versatile plugin on the planet right now... If it cost $400, I would've bought it.. Seriously. It makes other multiband compressor plugs look like toys.. Think of it as a dynamic EQ with wings, a jet engine and stealth capabilities.. I've used it the most on acoustic guitar and vocals.. The things you can do with this on acoustic guitars is almost mind blowing. You can basically flip a guitar inside out.. Take the weakest part and make it the focal point.. Drive subtle harmonics to the surface and calm the brightest string strikes... Even enhance the stereo image.. Again, with no noticeable coloration and definitely no artifacts.. If I could only use one plugin the rest of my life, it would be a coin flip between the Pro-MB and Lexicon reverb plugs.
See also: Compression Software, FabFilter, FabFilter Plug-ins: Dynamics