AudioFu Chart · November 2026
Best Filter Modules for Advanced 2026
The top pick is Verbos Electronics Dual Four Pole ($502). Xaoc Devices Belgrad Dual Peak State Variable Filter gives you the most for the money at $363. Frap Tools Cunsa Sound Seasoning leads the high end. Ranked by the AudioFu Index from 89 models across 29 brands, prices checked every night.
Last updated: November 1, 2026
Top 10
Full detail for the 10 highest AudioFu Index scores. Every other model is listed below.
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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 ↗ -
Xaoc Devices Belgrad Dual Peak State Variable Filter
Belgrad · XAOC Devices
18 for sale on Reverb1 finish at Thomann
The Belgrad is a powerhouse of a filter module – it’s seriously versatile. It’s ideal for sound designers and experimental musicians who want a wide palette of filter sounds, from subtle movement to chaotic, screaming textures. The non-linear feedback adds a real edge and makes it a real characterful module.
Pros
- Exceptional filter character, blending warmth and aggressive resonance.
- Unique filter modes offer incredible sonic versatility.
- Robust build quality with a reassuringly solid feel.
Cons
- Power consumption is relatively high for a single module.
- Steeper learning curve for mastering all filter modes.
72AudioFu
IndexStableno change since Aug 17Aug 17$363 now$363€325 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 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 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 ↗ -
The Gemini 2412 is a seriously cool module for anyone wanting that classic Sequential Engine Music sound. It’s a fantastic way to add warmth and movement to your patches, especially if you’re into experimental sound design or recreating vintage synth tones. Really shines for ambient and cinematic soundscapes.
Pros
- Classic SEM filter sound, incredibly warm and resonant
- Dual SVF design offers unique filtering possibilities
- Silver faceplate elevates the module's aesthetic appeal
Cons
- Parallel/serial switching can be a bit fiddly in performance
- Limited modulation options beyond CV input
45AudioFu
IndexStableno change since Aug 17Aug 17$513 now$513€459 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 Octopass is a serious contender if you're chasing that classic Moog filter sound in a Eurorack format and need polyphonic capabilities. It's a fantastic workhorse for sound design and sequencing, especially if you're already invested in Tiptop's Polytip ecosystem. This module shines for those wanting a focused, powerful filter without the complexity of a multi-mode behemoth.
Pros
- Exceptional 24dB low-pass character, classic Moog-inspired warmth.
- Polytip system enables genuinely polyphonic Eurorack workflows.
- Robust build quality with Tiptop's signature metal chassis.
Cons
- Polytip cables are proprietary and add to the overall expense.
- 20HP footprint can be restrictive in smaller Eurorack cases.
44AudioFu
Index↓ 9.5%since Aug 17 · lowest so far$468 · Aug 17$423 now$423€379 at Thomann · in stockCheck price ↗ -
The Joranalogue Filter 8 is a seriously cool module if you're into that classic, slightly gritty filter sound. It's perfect for experimental sound designers, ambient producers, or anyone wanting to add a unique, warm texture to their modular system – it’s a real character piece.
Pros
- OTA-based filter delivers a uniquely warm, vintage-inspired tone.
- 8-pole outputs offer incredible flexibility for complex sound design.
- Internal transient generator is surprisingly useful for percussive textures.
Cons
- The OTA design can be a bit noisy at higher resonance settings.
- Limited modulation options beyond basic CV and FM.
56AudioFu
IndexStableno change since Aug 17Aug 17$330 now$330€295 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
Erica Synths Graphic Resonant FBErica Synths40Stable$412€369$412€369Check ↗
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AJH Synth Matrix VCF blackAJH Synth39Stable$435€389$435€389Check ↗
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ADDAC 601 VC Fixed FilterbankADDAC39Stable$479€429$479€429Check ↗
- 14
ADDAC 603 VC Triple Bandpass FilterADDAC39Stable$479€429$479€429Check ↗
- 15
XAOC Devices OradeaXAOC Devices39Stable$557€499$557€499Check ↗
- 16
TouellSkouarn Ar Merc´het BraoTouellSkouarn37Stable$401€359$401€359Check ↗
- 17
Tiptop Audio Buchla Model 296tTiptop Audio37↑ 5.0%$703€629$703€629Check ↗
- 18
AJH Synth Sonic XV blackAJH Synth39Stable$390€349$390€349Check ↗
- 19
Tiptop Audio Buchla Model 292tTiptop Audio39Stable$389€348$389€348Check ↗
- 20
Doepfer A-121s VEDoepfer · 4 finishes58Stable$289€259$289€259Check ↗
- 21
Future Retro TransferFuture Retro35Stable$401€359$401€359Check ↗
- 22
Industrial Music Electronics Bionic Lester MKIIIIndustrial Music Electronics35Stable$535€479$535€479Check ↗
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Weston Precision Audio SF1 Dual / Stereo FilterWeston Precision Audio37Stable$390€349$390€349Check ↗
- 24
Shakmat Modular Centaur´s GateShakmat Modular38Stable$379€339$379€339Check ↗
- 25
Modbap Modular MeridianModbap Modular35Stable$372€333$372€333Check ↗
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Schlappi Engineering 100 Grit BlackSchlappi Engineering · 2 finishes43Stable$322€288$322€288Check ↗
- 27
Vostok Instruments AtlasVostok Instruments35Stable$355€318$355€318Check ↗
- 28
AJH Synth MiniMod VCF blackAJH Synth39Stable$330€295$330€295Check ↗
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BASTL Instruments IkarieIkarie · Bastl Instruments34Stable$355€318$355€318Check ↗
- 30
Weston Precision Audio TriviumWeston Precision Audio37Stable$334€299$334€299Check ↗
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u-he MELTu-he35Stable$334€299$334€299Check ↗
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Klavis GrainityKlavis35Stable$312€279$312€279Check ↗
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XAOC Devices ZagrzebXAOC Devices39Stable$289€259$289€259Check ↗
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XAOC Devices KatowiceXAOC Devices39Stable$288€258$288€258Check ↗
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Doepfer A-105-4 Quad Poly VCFDoepfer45Stable$245€219$245€219Check ↗
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Shakmat Modular Dual DaggerShakmat Modular38Stable$277€248$277€248Check ↗
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Stylophone CPM DF-8Stylophone35Stable$288€258$288€258Check ↗
- 38
ADDAC 604 Dual FilterADDAC39Stable$245€219$245€219Check ↗
- 39
Befaco BF-22 Sallen Key FilterBefaco38Stable$245€219$245€219Check ↗
- 40
Doepfer A-124 VCF5 Wasp FilterA-124 Wasp Filter SE · Doepfer · 2 finishes78Stable$98€88$98€88Check ↗
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Doepfer A-106-5 12dB SEM Type Voltage Controlled FilterA-106-5 SEM Filter Special Ed. · Doepfer · 2 finishes73Stable$95€85$95€85Check ↗
- 42
Erica Synths Pico VCF1 FilterPico VCF1 · Erica Synths70Stable$111€99$111€99Check ↗
- 43
Endorphin.es Squawk Dirty To Me Eurorack Synth ModuleSquawk Dirty To Me Silver · Endorphin.es · 2 finishes63↓ 2.2%$196€175$196€175Check ↗
- 44
Erica Synths Black Multimode VCFErica Synths63Stable$200€179$200€179Check ↗
- 45
Behringer 904B Voltage Controlled High Pass Filter Eurorack…904B VC High Pass Filter · Behringer62Stable$31€28$31€28Check ↗
- 46
Erica Synths Black Polivoks VCF V2Erica Synths61Stable$221€198$221€198Check ↗
- 47
Doepfer A-120 VCF1 24dB Low Pass FilterA-120 · Doepfer · 2 finishes59Stable$128€115$128€115Check ↗
- 48
Verbos Electronics Noise & FilterVerbos Electronics57Stable$139€124$139€124Check ↗
- 49
Behringer 121 Dual VCF Eurorack Synthesizer Module121 Dual VCF · Behringer56Stable$47€42$47€42Check ↗
- 50
Doepfer A-101-1 Vactrol VCFA-101-1 · Doepfer55↓ 4.1%$155€139$155€139Check ↗
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 Character
A shallow, gentle resonance is fine for subtle warmth, but advanced players need that screaming, self-oscillating potential. The character of the resonance - whether it's smooth and creamy or has a gritty, FM-like edge - is key to the sounds you can create.
Filter Topology
Ladder filters are classic, but state-variable, multimode (2-pole, 4-pole), and even more esoteric topologies (like comb filters) offer unique sonic possibilities. Understanding the phase response and harmonic distortion characteristics of each is crucial for advanced sound design.
Modulation Options
Beyond basic cutoff frequency modulation, look for features like resonance modulation, drive/saturation modulation, and even filter-specific FM inputs. The more ways you can dynamically shape the filter's behavior, the more expressive your patches will be.
Parallel Filtering/Series Filtering
Advanced players often want to stack filters for complex tonal shaping. Modules offering parallel (filters run independently, outputs summed) and series (output of one filter becomes input of the next) filtering capabilities open up a world of sonic possibilities.
Drive/Saturation
A good filter module shouldn't just clean up a signal; it should be able to enhance it. Built-in drive or saturation stages can add warmth, grit, and harmonic complexity, especially when pushed hard with resonance.
Buying guide
So you're past the basic Moog ladder filter and want to really sculpt some sounds? Good. Filter modules are the heart of a lot of what makes modular synths sing, but they're also where things get seriously deep. We're talking about modules that can do more than just a basic low-pass; we're talking about complex resonance sweeps, parallel filtering, and shaping the harmonic content in ways that will completely transform your patches. Let's dive in.
Don't chase the biggest number of knobs. A complex module is only useful if you understand how to use it; a steep learning curve is part of the deal. Cheap modules often compromise on component quality - that means muddy low-end, brittle highs, and resonance that collapses instead of screaming.
It's worth paying a bit more for a module that sounds and feels solid, and has a good manual. You'll actually use it.
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 2-pole and 4-pole filter?
Generally, more poles mean a steeper cutoff slope and more resonance. A 4-pole filter will have a more dramatic effect and potentially more self-oscillation. But a 2-pole can be more subtle and musical, especially in parallel configurations.
Can I use a filter module as an oscillator?
Absolutely! When you crank the resonance high enough, many filters will self-oscillate, producing a sine wave-like tone. This is a common technique for creating unique soundscapes and drones.
What's the best filter for bass?
It depends on the bass sound you want. A ladder filter with a smooth resonance can create a classic Moog-style bass. A state-variable filter offers more precise control over phase and harmonic content. Experiment! Don't be afraid to drive the input a little for some grit.
I'm overwhelmed by the options. Where should I start?
Start with a versatile multimode filter - something with a few different topologies and decent modulation options. Then, dive deep into its capabilities. Don't buy a dozen filters at once.
Is saturation always a good thing?
Not always. Too much saturation can make a sound muddy and indistinct. It's about finding the sweet spot where it adds character and warmth without masking the underlying tone. Use your ears!
