AudioFu Chart · November 2026
Best Filter Modules for Professional 2026
The top pick is Verbos Electronics Bark Filter Processor ($1,078). Verbos Electronics Dual Four Pole gives you the most for the money at $502. Ranked by the AudioFu Index from 89 models across 29 brands, prices checked every night.
Last updated: November 2, 2026
Top 10
Full detail for the 10 highest AudioFu Index scores. Every other model is listed below.
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The Bark Filter Processor is a seriously unique tool for sound designers and experimental musicians. Its 12-band fixed filter bank, combined with the Frequency Scan and Spectral Tilt, lets you create incredibly complex and evolving textures. It's not a general-purpose filter, but if you're chasing truly otherworldly sounds, this is a game-changer.
Pros
- Exceptional spectral sculpting capabilities for unique sound design
- The Frequency Scan offers incredibly musical and dynamic modulation
- Individual band level faders provide precise tonal shaping
Cons
- High current draw demands a powerful PSU in your modular setup
- Steep learning curve; mastering the Bark takes dedication and experimentation
61AudioFu
IndexStablesince Aug 17$1,078 · Aug 17$1,078 now$1,078€965 at Thomann · in stockCheck price ↗ -
The Cunsa is a seriously impressive filter module. It's got a really distinctive character – not your typical Moog-style filter – with a raw, almost aggressive edge that’s fantastic for experimental sound design or adding grit to more conventional patches. This is a perfect module for seasoned modular users looking to expand their sonic palette and create complex, evolving textures.
Pros
- Exceptional filter character; truly unique and musical voicing.
- Robust build quality with Frap's signature meticulous craftsmanship.
- Comprehensive CV control allows for deep, dynamic sound sculpting.
Cons
- 42HP is substantial; requires a larger Eurorack case.
- Price point positions it as a premium investment for serious users.
51AudioFu
IndexStablesince Aug 17$1,105 · Aug 17$1,105 now$1,105€989 at Thomann · in stockCheck price ↗ -
Frap Tools Fumana - Dual 16 Bands Spectral Editor
Fumana · Frap Tools
3 for sale on Reverb1 finish at Thomann
The Fumana is a truly unique filter module; its 16-band design allows for incredibly detailed spectral manipulation. It's perfect for sound designers and experimental musicians who want to craft otherworldly textures and complex rhythmic patterns—be prepared to dive deep into its intricacies, though.
Pros
- Exceptional spectral sculpting capabilities with 16 bandpass filters
- Envelope follower per band offers unique modulation possibilities
- Dual filter paths allow complex carrier/modulator processing
Cons
- Significant power draw demands a robust PSU
- Steep learning curve due to intricate routing options
45AudioFu
IndexStableno change since Aug 17Aug 17$1,071 now$1,071€959 at Thomann · in stockCheck price ↗ -
The 296t is a beast for sound design and experimental textures. If you're into vocoding, complex filtering, or just want to mangle sounds in seriously unique ways, this module will be your new best friend. It's a premium-priced piece, but the sonic possibilities are truly rewarding once you wrap your head around it.
Pros
- Exceptional sonic sculpting capabilities with 16 distinct bands.
- Robust build quality; Tiptop's signature metal chassis feels solid.
- Envelope follower outputs offer unique modulation possibilities.
Cons
- Steep learning curve; mastering the complex routing takes dedication.
- Power hungry; demands a substantial amount of current from your PSU.
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This Dual Four Pole is a beautifully voiced filter module, perfect for sound designers and experimental musicians seeking a refined, analog character. It’s a serious upgrade for those wanting to sculpt complex textures and evolving soundscapes – not so much a screaming, aggressive filter, but a truly musical one.
Pros
- Exceptional discrete filter design delivers a warm, organic tone.
- Normalisation provides a seamless, resonant high-to-low-pass transition.
- Well-built with robust construction and quality components – feels solid.
Cons
- 21 TE width can be restrictive in smaller Eurorack cases.
- Limited resonance range; lacks aggressive self-oscillation for extreme sounds.
69AudioFu
Index↓ 15.1%since Aug 17 · lowest so far$591 · Aug 17$502 now$502€449 at Thomann · in stockCheck price ↗ -
4MS Spectral Multiband Resonator
Spectral Multiband Resonator · 4ms
12 for sale on Reverb1 finish at Thomann
The Spectral Multiband Resonator is a seriously unique tool for sound design. It’s not a simple filter; it’s a resonant landscape generator perfect for experimental electronic music, ambient soundscapes, and anyone wanting to push the boundaries of modular synthesis. Be prepared to dig in – it's rewarding, but takes some effort to truly master.
Pros
- Exceptional tonal sculpting with six independently tunable bands.
- The scale quantization offers surprisingly musical and predictable results.
- Envelope follower per channel unlocks unique rhythmic and textural possibilities.
Cons
- The 26U width demands significant space in a modular setup.
- Steep learning curve; mastering all controls requires dedication.
62AudioFu
IndexStableno change since Aug 17Aug 17$479 now$479€429 at Thomann · in stockCheck price ↗ -
The Oradea is a truly unique filter module – it's not just a filter, it's a resonant sound design powerhouse. It's perfect for experimental electronic musicians and sound designers looking to create complex, evolving textures and otherworldly soundscapes, but newcomers should be prepared to spend some time learning its nuances.
Pros
- Exceptional resonance creates complex, evolving textures.
- Four independent channels offer incredible sonic layering possibilities.
- Phase reverse switches add significant tonal shaping flexibility.
Cons
- Requires Arad Resonator Commander for full feature set; a separate investment.
- Can be overwhelming for beginners due to its complexity.
39AudioFu
IndexStableno change since Aug 17Aug 17$557 now$557€499 at Thomann · in stockCheck price ↗ -
The QPAS is a powerhouse for sound designers and experimental musicians. Its ability to sculpt a wide stereo field with its unique filter topologies is genuinely impressive—it's a characterful, complex module that rewards exploration. This is perfect for those looking to add serious texture and movement to their modular patches.
Pros
- Exceptional stereo image creation with unique filter cores
- Smile pass mode offers truly novel and characterful filtering
- Pre-VCA adds useful dynamic shaping capabilities
Cons
- Relatively high current draw can strain power supplies
- Steep learning curve for mastering all modulation options
61AudioFu
IndexStableno change since Aug 17Aug 17$467 now$467€418 at Thomann · in stockCheck price ↗ -
The Gemini 2412 is a serious contender for anyone craving that classic Sequential Circuits SEM filter vibe in a Eurorack format. The dual design and serial/parallel switching really open up creative possibilities for complex textures and evolving sounds – it's a fantastic choice for sound designers and experimental musicians.
Pros
- Classic SEM filter sonics, exceptionally warm and resonant
- Excellent build quality with robust metal chassis
- Parallel/serial operation expands sonic possibilities greatly
Cons
- 28 TE footprint demands significant Eurorack space
- Limited modulation options beyond CV input
45AudioFu
IndexStableno change since Aug 17Aug 17$524 now$524€469 at Thomann · in stockCheck price ↗ -
Industrial Music Electronics Bionic Lester MKIII
Not on Reverb yet1 finish at Thomann
The Bionic Lester MKIII is a seriously cool filter module, especially if you're into industrial, experimental, or glitchy sounds. It nails that 90s digital filter vibe, and the morphing and CV control give you tons of creative options for sculpting movement and texture. A great addition for anyone building a modular system focused on sound design.
Pros
- Excellent filter character, emulating classic 90s digital filters.
- Preset morphing adds serious creative potential for evolving soundscapes.
- Flexible CV routing allows for intricate modulation possibilities.
Cons
- Limited preset slots – 8 might not be enough for extensive sound design.
- Digital filter emulation, while good, lacks the unpredictable grit of true analog.
35AudioFu
IndexStableno change since Aug 17Aug 17$535 now$535€479 at Thomann · in stockCheck price ↗
All 89 filter modules
Same index, same nightly prices — compact. Colour options of one model share a row. Tap a photo to zoom.
- 11
ADDAC 601 VC Fixed FilterbankADDAC39Stable$479€429$479€429Check ↗
- 12
ADDAC 603 VC Triple Bandpass FilterADDAC39Stable$479€429$479€429Check ↗
- 13
Tiptop Audio OctopassTiptop Audio44↓ 9.6%$423€379$423€379Check ↗
- 14
AJH Synth Matrix VCF blackAJH Synth39Stable$435€389$435€389Check ↗
- 15
Erica Synths Graphic Resonant FBErica Synths40Stable$412€369$412€369Check ↗
- 16
Xaoc Devices Belgrad Dual Peak State Variable FilterBelgrad · XAOC Devices72Stable$363€325$363€325Check ↗
- 17
Doepfer A-121sDoepfer · 4 finishes58Stable$278€249$278€249Check ↗
- 18
Joranalogue Audio Design Filter 8Joranalogue Audio Design56Stable$330€295$330€295Check ↗
- 19
Erica Synths Black Polivoks VCF V2Erica Synths61Stable$221€198$221€198Check ↗
- 20
Erica Synths Black Multimode VCFErica Synths63Stable$200€179$200€179Check ↗
- 21
Endorphin.es Squawk Dirty To Me Eurorack Synth ModuleSquawk Dirty To Me Silver · Endorphin.es · 2 finishes63↓ 2.2%$196€175$196€175Check ↗
- 22
Doepfer A-105-4 Quad Poly VCFDoepfer45Stable$245€219$245€219Check ↗
- 23
Schlappi Engineering 100 GritSchlappi Engineering · 2 finishes43Stable$312€279$312€279Check ↗
- 24
Befaco Pony VCF Eurorack Synthesizer ModulePony VCF · Befaco52Stable$207€185$207€185Check ↗
- 25
ADDAC 604 Dual FilterADDAC39Stable$245€219$245€219Check ↗
- 26
XAOC Devices KatowiceXAOC Devices39Stable$288€258$288€258Check ↗
- 27
XAOC Devices ZagrzebXAOC Devices39Stable$289€259$289€259Check ↗
- 28
AJH Synth MiniMod VCF blackAJH Synth39Stable$330€295$330€295Check ↗
- 29
Tiptop Audio Buchla Model 292tTiptop Audio39Stable$389€348$389€348Check ↗
- 30
AJH Synth Sonic XV blackAJH Synth39Stable$390€349$390€349Check ↗
- 31
Befaco BF-22 Sallen Key FilterBefaco38Stable$245€219$245€219Check ↗
- 32
Shakmat Modular Dual DaggerShakmat Modular38Stable$277€248$277€248Check ↗
- 33
Shakmat Modular Centaur´s GateShakmat Modular38Stable$379€339$379€339Check ↗
- 34
Erica Synths Drum Stereo DJ VCFErica Synths40Stable$233€209$233€209Check ↗
- 35
Weston Precision Audio TriviumWeston Precision Audio37Stable$334€299$334€299Check ↗
- 36
Weston Precision Audio SF1 Dual / Stereo FilterWeston Precision Audio37Stable$390€349$390€349Check ↗
- 37
TouellSkouarn Ar Merc´het BraoTouellSkouarn37Stable$401€359$401€359Check ↗
- 38
BASTL Instruments Cinnamon Voltage Controlled State Variable FilterCinnamon · Bastl Instruments49Stable$196€175$196€175Check ↗
- 39
Joranalogue Audio Design Flow 3Joranalogue Audio Design37Stable$240€215$240€215Check ↗
- 40
Make Noise DXGMake Noise37Stable$240€215$240€215Check ↗
- 41
Stylophone CPM DF-8Stylophone35Stable$288€258$288€258Check ↗
- 42
Klavis GrainityKlavis35Stable$312€279$312€279Check ↗
- 43
u-he MELTu-he35Stable$334€299$334€299Check ↗
- 44
Vostok Instruments AtlasVostok Instruments35Stable$355€318$355€318Check ↗
- 45
Modbap Modular MeridianModbap Modular35Stable$372€333$372€333Check ↗
- 46
Future Retro TransferFuture Retro35Stable$401€359$401€359Check ↗
- 47
BASTL Instruments IkarieIkarie · Bastl Instruments34Stable$355€318$355€318Check ↗
- 48
Doepfer A-101-1 Vactrol VCFA-101-1 · Doepfer55↓ 4.1%$155€139$155€139Check ↗
- 49
Doepfer A-120 VCF1 24dB Low Pass FilterA-120 Vintage Edition · Doepfer · 2 finishes59Stable$140€125$140€125Check ↗
- 50
Tiptop Audio ResonatorTiptop Audio39Stable$211€189$211€189Check ↗
Filter Modules by the numbers
Measured across all 101 models we track, not a sample.
Median $207 — half of all filter modules here cost less.
How to choose the best filter modules
Resonance Control
It's not just about 'more resonance'; it's about the type of resonance. Does it self-oscillate cleanly? Does it add a pleasing harmonic complexity or just a muddy, undefined buzz? A good resonance should be usable across a wide range of frequencies and filter types.
Filter Topology (Moog, State Variable, Ladder, etc.)
Each topology has a distinct character. Moog filters offer that fat midrange honk, State Variable filters are clean and precise, Ladder filters can get aggressive and biting. Knowing what you want-smooth warmth or surgical precision-dictates your choice.
Drive/Saturation
A little drive can add grit and harmonic richness, but too much can just turn into noise. The best filter modules offer nuanced drive controls-a clean boost, subtle saturation, or full-on distortion-that integrate seamlessly with the filtering process.
Modulation Options
Pro players want to modulate everything. Multiple input routings for envelope followers, LFOs, and external CV sources are essential. A filter that's stuck in static mode is just a novelty, not a tool.
Stereo/Multimode Capabilities
Mono is fine for some things, but for pads, leads, or anything meant to fill out a stereo image, a true stereo filter or the ability to easily split and process signals is a huge advantage. Multimode filters (lowpass, highpass, bandpass, notch) add serious versatility.
Buying guide
Alright, let's talk filters. You're past the point of just wanting a 'warm' sound-you need a filter that can sculpt a soundscape, carve out space in a dense mix, or deliver that aggressive, saturated edge for a gritty lead. Choosing a modular filter isn't about presets, it's about control and sonic possibilities. We're focusing on modules that give you the depth and flexibility pro players demand.
Don't chase the hype. A complex filter module has a learning curve, and the cheapest ones often cut corners on component quality, leading to muddy lows and harsh highs. Paying more generally buys you better components, more nuanced control, and a filter that will actually inspire you to experiment-and stand up to years of gigging.
Consider your existing modular ecosystem; a filter that complements your other modules will sound far better than one that fights them.
How the AudioFu Index works
Five measured signals and nothing else — no stars from strangers, no “tested by experts” we didn’t do. The weights are fixed and public. We don’t play these instruments; we measure the market around them.
This chart covers 101 filter modules from the Thomann catalogue. Before you buy, read hands-on reviews and, where you can, play it. Full methodology.
AudioFu earns a commission when you buy through our Thomann links. It never changes the order — the index does.
- Demand40%
How many of this exact model are for sale on Reverb right now — what musicians actually buy and resell.
- Lineup20%
How many finishes Thomann stocks — makers expand the models that sell.
- Price15%
Where the price has moved since we started tracking in August.
- Specs15%
How completely the maker documents it.
- Maker10%
How deep the brand’s range is in this category.
Questions
What's the difference between a Moog and a State Variable filter?
Moog filters are known for their characteristic 'fatness' and midrange bump-great for classic synth sounds. State Variable filters are cleaner, more precise, and offer a wider frequency response, making them versatile for more modern or surgical filtering.
How important is resonance self-oscillation?
It's a bonus, not a necessity. Self-oscillation allows you to create wild, unstable sounds without an oscillator signal, but a filter that doesn't self-oscillate can still be incredibly versatile. Just depends on your sonic goals.
Can I use a filter module as a regular EQ?
Technically, yes, but it won't be as precise or flexible as a dedicated EQ. Filters excel at dynamic shaping and creating movement, whereas EQs are better for static correction. Think of a filter as a creative tool, not a surgical one.
I'm new to modular synthesis - is a complex filter module a good starting point?
Not really. Start with a simpler VCO and VCF to understand the basics. A complex filter module can be overwhelming if you don't grasp the fundamentals first. You'll just get frustrated.
What does 'multimode' really mean?
It means the filter can operate in different modes - lowpass, highpass, bandpass, and notch. Each mode emphasizes different frequencies, giving you a wider range of sonic possibilities. It's far more useful than just a lowpass filter.
