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Effect
FabFilter Pro-MB
FabFilter · $199.00
FabFilter Pro-MB is a multiband dynamics plug-in offering up to six bands of compression, expansion, limiting and gating.
9.1
Essential9.1
EssentialThe Dubspot verdict
The cleanest, most surgical multiband dynamics processor on the market, with FabFilter's trademark interface making complex frequency-conscious compression genuinely intuitive.
Best for: Mixing and mastering engineers who need precise, transparent multiband compression, de-essing, or dynamic EQ without a steep learning curve.
Pros
- Best-in-class visual interface with real-time spectrum analyzer
- Dynamic Phase mode gives zero latency with no phase smearing
- Extremely transparent and CPU-efficient for its power
- Per-band mid/side, external sidechain, and dynamic EQ behavior
Cons
- $199 is steep versus stock and bundled multiband options
- Overlaps heavily with Pro-Q's dynamic EQ for many tasks
- No adaptive/auto modes for hands-off users
FabFilter Pro-MB is a multiband dynamics processor that handles up to six freely positioned bands, each capable of compression, limiting, expansion, gating, or upward compression. It sits in that sweet spot between a traditional multiband compressor and a dynamic EQ. You can drag crossovers anywhere on the spectrum, tighten a boomy low end, tame a harsh 3 kHz resonance, or add controlled excitement to the top, all from one window.
Where Pro-MB genuinely excels is clarity of workflow. The interface overlays your dynamics decisions directly on a live spectrum analyzer, so you see exactly which frequencies you are acting on. Bands can behave in a "dynamic" mode that only engages when a signal crosses the threshold, which effectively turns Pro-MB into a surgical problem-solver rather than a blunt tone-shaper. The Dynamic Phase processing mode is the standout: it delivers zero latency with none of the phase smearing that plagues conventional crossovers, and Linear Phase is there when transparency matters more than speed.
The processing itself is clean and neutral by design. Pro-MB will not add analog character or color the way some vintage-modeled multibands do. That is the trade-off. If you want glue and grit, an SSL-style bus compressor or a saturating multiband will serve you better. Pro-MB is a scalpel, not a hammer.
Against its alternatives, the picture is nuanced. FabFilter Pro-DS is the better dedicated de-esser, though Pro-MB can de-ess competently. iZotope Neutron 5 bundles more automated, AI-assisted tools for less thoughtful users. And FabFilter's own Pro-Q dynamic EQ overlaps significantly for gentle tonal work, which makes the $199 price harder to justify if you already own it.
Choose Pro-MB when you need precise, transparent, frequency-conscious dynamics control and value a workflow you can actually see. For mixing and mastering engineers, it earns its keep.
Specifications
- Processing bands
- Up to six bands, freely positioned in the spectrum
- Dynamics modes
- Compression, limiting, expansion, gating, and upward compression
- Processing modes
- Dynamic Phase (zero latency), Linear Phase, and Minimum Phase
- Crossover slope
- Adjustable from 6 to 48 dB/octave
- Per-band controls
- Threshold, range, attack, release, ratio, knee, lookahead (up to 20 ms), mid/side, and external sidechain
- Internal processing
- 64-bit, with up to four times linear-phase oversampling
Last verified 2026-06-16
FAQ
What plugin formats does FabFilter Pro-MB support?
It is available in VST, VST3, Audio Units, CLAP, AAX Native, and AudioSuite formats, in both 64-bit and 32-bit versions where applicable.
What operating systems does FabFilter Pro-MB run on?
Windows 11, 10, 8, 7, or Vista (64-bit or 32-bit), and macOS 10.13 or higher (64-bit only) on Apple Silicon or Intel processors.
What types of dynamics processing can Pro-MB do?
Each of its up to six bands can perform compression, limiting, expansion, gating, and upward compression.