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Warwick Alien Deluxe Hybrid 4 LH… ↓ 33.4% $671Allen & Heath SQ5 ↓ 28.8% $2,912Warwick Alien Deluxe 5 NT LH ↓ 27.8% $727Allen & Heath SQ5 Case Bundle I ↓ 26.7% $3,170Casio AP-S200 BN ↓ 23.9% $963Allen & Heath SQ5, Case, DX168/X… ↓ 21.7% $5,187Dangerous Music 2 Bus+ ↓ 21.0% $4,033Orange PPC212-COB ↓ 20.6% $586Orange Micro Dark ↓ 20.2% $195Seymour Duncan SHR-1B Hot Rails… ↓ 19.3% $122Seymour Duncan SHR1N BLK ↓ 19.3% $122Seymour Duncan SL59-1N BLK ↓ 19.3% $122Seymour Duncan SL59-1B Bridge… ↓ 19.3% $122Seymour Duncan SL59-1B Creme ↓ 19.3% $122Seymour Duncan SL59-1N Creme ↓ 19.3% $122Seymour Duncan SL59-1B Parchment ↓ 19.3% $122

AudioFu Chart · October 2026

Best Filter Modules Under $500 2026

The top pick is Doepfer A-124 VCF5 Wasp Filter ($99). Behringer 914 Fixed Filter Bank Eurorack Synthesizer Module gives you the most for the money at $58. 4MS Spectral Multiband Resonator leads the high end. Ranked by the AudioFu Index from 82 models across 28 brands, prices checked every night.

Last updated: October 12, 2026

82models in this chart
28brands
$196median price
24price drops since Aug

Narrow the chart

All Filter Modules Showing: Under $500 · clear
Price
Skill level
Brand

Top 10

Full detail for the 10 highest AudioFu Index scores. Every other model is listed below.

  1. Doepfer A-124 VCF5 Wasp Filter

    A-124 Wasp Filter · Doepfer

    12 for sale on Reverb2 finishes at Thomann

    The Doepfer A-124 Wasp Filter is a quirky, characterful module that delivers a distinct, gritty sound. It's a fantastic choice for sound designers and experimental musicians looking to add a touch of vintage edge and controlled chaos to their patches—it’s not a substitute for a clean, surgical filter, but a flavorful accent.

    Pros

    • Unique, aggressive filter character inspired by the Waspin synth
    • Provides distinct distortion and 'dirty' sonic textures
    • Offers bandpass and combined low/notch/highpass outputs for versatility

    Cons

    • Limited resonance control compared to more modern filter designs
    • Can be noisy if gain staging isn't carefully managed
    78AudioFu
    Index
    • Demand89
    • Lineup68
    • Price50
    • Maker100
    Stableno change since Aug 14
    Aug 14$99 now
    $99€88 at Thomann · in stock
    Check price ↗

  2. Doepfer A-106-5 12dB SEM Type Voltage Controlled Filter

    A-106-5 SEM Filter · Doepfer

    9 for sale on Reverb2 finishes at Thomann

    This A-106-5 SEM filter is a fantastic recreation of a classic voice – it’s a genuine slice of vintage synth goodness in a tiny package. Perfect for those wanting that warm, resonant SEM sound without the expense of a full vintage module, and it slots neatly into any Eurorack system.

    Pros

    • Classic SEM filter character, instantly recognizable and warm
    • Excellent build quality typical of Doepfer's meticulous engineering
    • Compact 8HP footprint, ideal for dense modular setups

    Cons

    • Limited filter modes compared to more modern, complex filters
    • Power draw might be significant for smaller power supplies
    74AudioFu
    Index
    • Demand80
    • Lineup68
    • Price50
    • Maker100
    Stableno change since Aug 14
    Aug 14$95 now
    $95€85 at Thomann · in stock
    Check price ↗

  3. Xaoc Devices Belgrad Dual Peak State Variable Filter

    Belgrad · XAOC Devices

    17 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
    Index
    • Demand100
    • Lineup43
    • Price50
    • Maker48
    Stableno change since Aug 14
    Aug 14$364 now
    $364€325 at Thomann · in stock
    Check price ↗

  4. Erica Synths Pico VCF1 Filter

    Pico VCF1 · Erica Synths

    12 for sale on Reverb1 finish at Thomann

    The Pico VCF1 is a fantastic little module for anyone wanting that classic, gritty Polivoks filter sound without the bulk. It's a real workhorse for experimental sound design and adding some edge to your modular patching, especially if you're into darker, industrial textures.

    Pros

    • Authentic Polivoks filter character, surprisingly powerful for its size
    • Russian NOS op-amps deliver a unique, vintage-flavored tone
    • Self-oscillation is clean and usable for wild sound design

    Cons

    • Limited filter modes compared to full-sized counterparts
    • Power draw is a bit higher than some other Pico modules
    68AudioFu
    Index
    • Demand89
    • Lineup43
    • Price50
    • Maker62
    Stableno change since Aug 14
    Aug 14$111 now
    $111€99 at Thomann · in stock
    Check price ↗

  5. 4MS Spectral Multiband Resonator

    Spectral Multiband Resonator · 4ms

    15 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.
    68AudioFu
    Index
    • Demand96
    • Lineup43
    • Price57
    • Maker21
    ↓ 2.3%since Aug 14 · lowest so far
    $492 · Aug 14$481 now
    $481€429 at Thomann · in stock
    Check price ↗

  6. Endorphin.es Squawk Dirty To Me Eurorack Synth Module

    Squawk Dirty To Me · Endorphin.es

    9 for sale on Reverb2 finishes at Thomann

    The Squawk Dirty To Me is a seriously fun and creative filter module. It’s perfect for experimental sound design and adding unique movement to your patches, especially if you’re already familiar with the Grand Terminal’s sonic character. It's a great way to add some unique character without a massive commitment.

    Pros

    • Exceptional filter variety; Grand Terminal sounds in a compact module.
    • Integrated VCA cleans up signal routing considerably.
    • Meta-CV scanning introduces evolving, unpredictable textures.

    Cons

    • 6HP is tight; space is at a premium in most racks.
    • Limited modulation destinations beyond cutoff and resonance.
    67AudioFu
    Index
    • Demand80
    • Lineup68
    • Price57
    • Maker33
    ↓ 2.2%since Aug 14 · lowest so far
    $201 · Aug 14$196 now
    $196€175 at Thomann · in stock
    Check price ↗

  7. Make Noise QPAS Module

    QPAS · Make Noise

    13 for sale on Reverb1 finish at Thomann

    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
    66AudioFu
    Index
    • Demand91
    • Lineup43
    • Price50
    • Maker33
    Stableno change since Aug 14
    Aug 14$468 now
    $468€418 at Thomann · in stock
    Check price ↗

  8. Behringer 914 Fixed Filter Bank Eurorack Synthesizer Module

    914 Fixed Filter Bank · Behringer

    6 for sale on Reverb1 finish at Thomann

    The 914 is a seriously impressive piece of kit for the price. It delivers a unique, almost Moog-like vibe with its fixed filter bank, perfect for sound designers and experimental musicians looking to add texture and movement without diving deep into complex modulation. It’s a great entry point into filter banks, offering a lot of sonic potential in a small package.

    Pros

    • Exceptional value for a 12-band filter bank.
    • Provides complex, resonant filter sweeps easily.
    • Parallel inputs/outputs offer flexible routing options.

    Cons

    • Fixed filter frequencies limit creative experimentation.
    • Plastic housing feels less robust than higher-end modules.
    65AudioFu
    Index
    • Demand67
    • Lineup43
    • Price86
    • Maker68
    ↓ 11.9%since Aug 14 · lowest so far
    $66 · Aug 14$58 now
    $58€52 at Thomann · in stock
    Check price ↗

  9. Erica Synths Black Multimode VCF

    Erica Synths

    9 for sale on Reverb1 finish at Thomann

    The Erica Synths Black is a fantastic, character-rich multimode filter that's a real workhorse. It's a great entry point into more complex filtering, especially if you’re chasing that vintage Moog vibe, and its small size is a huge bonus for Eurorack users. Perfect for sound design, experimental music, and adding warmth to synths.

    Pros

    • Gorgeous, warm filter character with genuine germanium overdrive tone
    • Excellent resonance sweep provides screaming, musical feedback possibilities
    • Compact 10HP footprint makes it ideal for dense modular setups

    Cons

    • The lowpass mode can be a bit muddy with extreme resonance
    • Limited filter modes compared to some pricier, more complex options
    64AudioFu
    Index
    • Demand80
    • Lineup43
    • Price50
    • Maker62
    Stableno change since Aug 14
    Aug 14$201 now
    $201€179 at Thomann · in stock
    Check price ↗

  10. Doepfer A-121d

    Doepfer

    Not on Reverb yet4 finishes at Thomann

    The A-121d is a workhorse filter module for Eurorack systems. Its dual filter design and delta control make it ideal for creating evolving textures and complex tones – a great choice for experimental sound designers and those seeking classic, resonant filter character. It's a fantastic value and a solid foundation for any modular setup.

    Pros

    • Dual filters offer incredible flexibility for complex sound design.
    • Delta control provides unique and evolving timbral shifts.
    • Solid Doepfer build quality ensures long-term reliability.

    Cons

    • 8HP footprint can be limiting in smaller Eurorack cases.
    • Filter resonance can get quite aggressive, requiring careful control.
    63AudioFu
    Index
    • Demand30
    • Lineup100
    • Price76
    • Maker100
    ↓ 8.8%since Aug 14 · lowest so far
    $178 · Aug 14$162 now
    $162€145 at Thomann · in stock
    Check price ↗

All 82 filter modules

Same index, same nightly prices — compact. Colour options of one model share a row. Tap a photo to zoom.

  1. 11
    Erica Synths Black Polivoks VCF V2Erica Synths
    Index 62Stable
    62
    Stable$222€198
    $222€198Check ↗
  2. 12
    Behringer 904B Voltage Controlled High Pass Filter Eurorack…904B VC High Pass Filter · Behringer
    Index 61Stable
    61
    Stable$31€28
    $31€28Check ↗
  3. 13
    Doepfer A-124-2Doepfer · 2 finishes
    Index 60↓ 17.4%
    60
    ↓ 17.4%$106€95
    $106€95Check ↗
  4. 14
    Behringer 121 Dual VCF Eurorack Synthesizer Module121 Dual VCF · Behringer
    Index 59↓ 4.6%
    59
    ↓ 4.6%$47€42
    $47€42Check ↗
  5. 15
    Doepfer A-120 VCF1 24dB Low Pass FilterA-120 · Doepfer · 2 finishes
    Index 59Stable
    59
    Stable$129€115
    $129€115Check ↗
  6. 16
    Behringer 1006 FiltAmp 4-Pole VCF / VCA Eurorack ModuleFiltamp Module 1006 · Behringer
    Index 58↓ 33.9%
    58
    ↓ 33.9%$44€39
    $44€39Check ↗
  7. 17
    Joranalogue Audio Design Filter 8Joranalogue Audio Design
    Index 57Stable
    57
    Stable$331€295
    $331€295Check ↗
  8. 18
    Doepfer A-101-1 Vactrol VCFA-101-1 · Doepfer
    Index 55↓ 4.1%
    55
    ↓ 4.1%$156€139
    $156€139Check ↗
  9. 19
    Doepfer A-105-2 VEDoepfer · 2 finishes
    Index 53↓ 4.8%
    53
    ↓ 4.8%$133€119
    $133€119Check ↗
  10. 20
    Verbos Electronics Noise & FilterVerbos Electronics
    Index 53Stable
    53
    Stable$139€124
    $139€124Check ↗
  11. 21
    Befaco Pony VCF Eurorack Synthesizer ModulePony VCF · Befaco
    Index 53Stable
    53
    Stable$207€185
    $207€185Check ↗
  12. 22
    BASTL Instruments Cinnamon Voltage Controlled State Variable FilterCinnamon · Bastl Instruments
    Index 52Stable
    52
    Stable$196€175
    $196€175Check ↗
  13. 23
    Behringer 904A Voltage Controlled Low Pass Filter Eurorack…904A VC Low Pass Filter · Behringer
    Index 51↓ 3.5%
    51
    ↓ 3.5%$31€28
    $31€28Check ↗
  14. 24
    Behringer SurgesBehringer
    Index 50↓ 20.0%
    50
    ↓ 20.0%$40€36
    $40€36Check ↗
  15. 25
    Behringer WASP Deluxe Desktop SynthesizerWasp VCF · Behringer
    Index 50Stable
    50
    Stable$55€49
    $55€49Check ↗
  16. 26
    Doepfer A-108 VCF8A-108 · Doepfer
    Index 49Stable
    49
    Stable$173€154
    $173€154Check ↗
  17. 27
    Doepfer A-121 VCF2 Multimode FilterA-121-2 · Doepfer · 2 finishes
    Index 48Stable
    48
    Stable$140€125
    $140€125Check ↗
  18. 28
    Doepfer A-106-6 XP FilterDoepfer
    Index 48↓ 5.7%
    48
    ↓ 5.7%$167€149
    $167€149Check ↗
  19. 29
    Tiptop Audio OctopassTiptop Audio
    Index 48↓ 24.1%
    48
    ↓ 24.1%$425€379
    $425€379Check ↗
  20. 30
    Behringer Multi Filter/Resonator 1047Behringer
    Index 47↓ 11.3%
    47
    ↓ 11.3%$53€47
    $53€47Check ↗
  21. 31
    NANO Modules FONTNANO Modules
    Index 46↓ 18.2%
    46
    ↓ 18.2%$101€90
    $101€90Check ↗
  22. 32
    Doepfer A-105-4 Quad Poly VCFDoepfer
    Index 46↓ 2.2%
    46
    ↓ 2.2%$245€219
    $245€219Check ↗
  23. 33
    Tiptop Audio Buchla Model 292tTiptop Audio
    Index 46↓ 12.8%
    46
    ↓ 12.8%$390€348
    $390€348Check ↗
  24. 34
    Doepfer A-103 18dB Low Pass FilterDoepfer
    Index 45Stable
    45
    Stable$100€89
    $100€89Check ↗
  25. 35
    Doepfer A-121-3Doepfer
    Index 45Stable
    45
    Stable$110€98
    $110€98Check ↗
  26. 36
    Doepfer A-101-2 Vactrol Lowpass GateDoepfer
    Index 45Stable
    45
    Stable$111€99
    $111€99Check ↗
  27. 37
    Doepfer A-123-2Doepfer
    Index 45Stable
    45
    Stable$129€115
    $129€115Check ↗
  28. 38
    Doepfer A-106-1 Xtreme Filter (MS20)Doepfer
    Index 45Stable
    45
    Stable$133€119
    $133€119Check ↗
  29. 39
    Doepfer A-104Doepfer
    Index 45Stable
    45
    Stable$156€139
    $156€139Check ↗
  30. 40
    Doepfer A-102Doepfer
    Index 44↑ 1.1%
    44
    ↑ 1.1%$100€89
    $100€89Check ↗
  31. 41
    Schlappi Engineering 100 GritSchlappi Engineering · 2 finishes
    Index 43Stable
    43
    Stable$313€279
    $313€279Check ↗
  32. 42
    Doepfer A-101-6 Opto VCF Opto FET Filter / PhaserA-101-6 · Doepfer
    Index 42Stable
    42
    Stable$115€103
    $115€103Check ↗
  33. 43
    Behringer SwordsBehringer
    Index 41Stable
    41
    Stable$111€99
    $111€99Check ↗
  34. 44
    Erica Synths Black LPGErica Synths
    Index 41↓ 2.1%
    41
    ↓ 2.1%$207€185
    $207€185Check ↗
  35. 45
    BASTL Instruments IkarieIkarie · Bastl Instruments
    Index 41Stable
    41
    Stable$356€318
    $356€318Check ↗
  36. 46
    AJH Synth Sonic XV blackAJH Synth
    Index 41↓ 2.8%
    41
    ↓ 2.8%$391€349
    $391€349Check ↗
  37. 47
    Future Retro TransferFuture Retro
    Index 41↓ 10.0%
    41
    ↓ 10.0%$402€359
    $402€359Check ↗
  38. 48
    Befaco BanditBefaco
    Index 40↓ 3.4%
    40
    ↓ 3.4%$189€169
    $189€169Check ↗
  39. 49
    Erica Synths Black 3109 VCF/VCAErica Synths
    Index 40Stable
    40
    Stable$207€185
    $207€185Check ↗
  40. 50
    Erica Synths Drum Stereo DJ VCFErica Synths
    Index 40Stable
    40
    Stable$234€209
    $234€209Check ↗

Filter Modules by the numbers

Measured across all 93 models we track, not a sample.

Price distribution

Median $196 — half of all filter modules here cost less.

5
10
20
13
21
15
9
<$50$50–100$100–150$150–200$200–300$300–400$400+

How to choose the best filter modules

Filter Type

Moog-style ladder filters are the gold standard for that fat midrange honk and aggressive resonance, but State Variable Filters (SVFs) offer a cleaner, more versatile sound - great for subtle movement or glassy textures. Consider what kind of vibe you're after.

Resonance

How far can you push that self-oscillation before it gets noisy and unusable? A good resonance control gives you screaming leads or subtle warmth, depending on the setting. Cheap modules often have resonance that just fizzles.

Drive/Saturation

Does the filter module have a built-in drive stage? This adds harmonic richness and grit, taking it beyond a clean sweep. It's a huge factor in getting that vintage, saturated sound.

Slope/Cutoff Range

A steeper slope (e.g., 24dB/octave) gives you more aggressive filtering, while a wider cutoff range lets you really sculpt the sound. Limited range can feel restrictive in complex patches.

Modulation Inputs

Can you modulate the cutoff, resonance, or even the filter type? This opens up a world of dynamic and evolving sounds. Look for CV inputs - they're essential for expressive patching.

Buying guide

Alright, so you're diving into the modular world but don't want to mortgage the house for a decent filter? Smart move. Filters are the heart of so much character - that warm, saturated low-end, the screaming resonance, the smooth vowel-like transitions - and you don't need to drop a grand to get something that'll inspire you. Let's look at some killer filter modules you can snag for under $500.

At this price point, you're trading off something. Some modules might have a slightly limited frequency range, others might have a less-refined resonance response. Don't expect boutique-level components or incredibly precise tracking - that's what you pay extra for.

Focus on modules with solid build quality and a sound that inspires you, even if it's not perfect. A great filter isn't about pristine accuracy; it's about vibe.

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 93 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 12dB/octave and 24dB/octave filters?

12dB filters are gentler, more subtle. 24dB filters are more aggressive, cut frequencies faster, and self-oscillate more readily. It's a matter of preference and what you're trying to achieve.

Can I use these filters for basslines?

Absolutely! A Moog-style filter with a little drive can give you that classic, warm low-end thump. SVFs are great for cleaner, more precise bass sounds too. Just pay attention to headroom.

What does 'self-oscillation' mean?

When the resonance is cranked high enough, the filter starts generating its own audio signal, independent of the input. It's a cool effect for leads and textures, but can be noisy if not controlled.

I'm new to modular, which filter type should I get?

Start with a Moog-style filter. It's incredibly versatile and a great foundation for learning the basics of sound design. Then explore SVFs for something different.

Are there any filters that are prone to noise?

Cheaper modules sometimes use components that introduce a little hiss or hum. It's usually subtle, but worth being aware of if you're recording in a quiet environment. A good power supply can help too.

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#1 · AudioFu Index 78Doepfer A-124 VCF5 Wasp Filter · $99€88
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 Check price ↗