Best Filter Modules Under $300 2026
Alright, so you're diving into the modular world but your bank account isn't thrilled about spending a fortune on filters. Totally get it. A good filter is the heart of a lot of sounds - that creamy low-pass, a gritty resonance sweep, or a surgical high-pass to clean up the mud. We're focusing on modules under $300 that actually deliver usable tone, not just cheap components and compromised design.
Last updated: September 24, 2026
⚡ The best filter modules in 2026 are Doepfer A-121s VE (top pick), XAOC Devices Zagrzeb for tighter budgets, and Stylophone CPM DF-8 for pros — selected from 15 options across 11 brands, priced $222–$295, ranked by brand, price and popularity.
Doepfer A-121s VE
by
Doepfer
Frequency Control
Tonal Character
Classic Synthesis
Key Feature:
The A-121s VE is a fantastic choice for anyone craving that classic, warm Moog-inspired filter sound in a Eurorack format. It's particularly well-suited for ambient, experimental, or retro-tinged electronic music where a touch of vintage character is essential. This is a workhorse module for serious modular explorers.
PROS
- • Vintage voicing delivers warm, organic tones ideal for classic synth sounds.
- • Stereo operation expands sonic possibilities, creating rich, evolving textures.
- • Delta F control offers unique filter interaction, pushing beyond standard VCFs.
- • Robust Doepfer build quality ensures long-term reliability and stability.
CONS
- • Limited filter modes compared to some modern, more flexible designs.
- • 100mA power draw per rail can strain smaller Eurorack power supplies.
- • Black front panel, while aesthetically pleasing, shows fingerprints easily.
⭐
4.9/5
AudioFu Score
Specs:
10/10
Detail:
8/10
Value:
7/10
Art. 551514
$296
XAOC Devices Zagrzeb
by
XAOC Devices
Frequency Control
Classic Synthesis
Tonal Character
Key Feature:
The Zagrzeb is a seriously capable stereo filter for those wanting a clean, musical tone. Its state variable design and spread control create a wide, immersive soundscape – ideal for ambient, experimental, or sound design applications where precise filtering is key. It's a fantastic addition to any modular setup needing a versatile, high-quality filter.
PROS
- • Exceptional stereo imaging thanks to the spread CV input.
- • State variable design delivers clean, musical filtering.
- • Resonance fader offers nuanced control over feedback.
- • Compact 8HP footprint maximizes patching flexibility.
CONS
- • Limited modulation options beyond the included FM CV inputs.
- • Can be a bit power hungry in a densely populated modular system.
- • Zagrzeb's character isn't as overtly aggressive as some filters.
⭐
4.8/5
AudioFu Score
Specs:
10/10
Detail:
7/10
Value:
7/10
Art. 528571
$296
Stylophone CPM DF-8
by
Stylophone
Tonal Character
Subtractive Synthesis
Frequency Control
Key Feature:
This filter module packs eight different sounds into each of its two channels. It can make noise into music by itself, which is cool. You need the matching keyboard to use it fully. It is great for making big, resonant sounds.
PROS
- • Eight distinct filter shapes per channel for complex tones
- • Self-oscillation lets filters play melodies without keys
- • High resonance adds punch to every filter type
- • Two independent filter channels create rich textures
CONS
- • Requires separate DS-2 keyboard to be fully used
- • No specific power draw data listed in text
- • Limited to LP mode for the single 24 dB/oct filter
⭐
4.6/5
AudioFu Score
Specs:
4/10
Detail:
10/10
Value:
7/10
Art. 630423
$294
XAOC Devices Katowice
by
XAOC Devices
Classic Synthesis
Audio Processing
Sound Shaping
Key Feature:
The Katowice is a seriously cool module for sound design and stereo widening. It’s fantastic for adding subtle movement or sculpting aggressive textures—especially if you're into experimental electronic music or want to add unique character to your existing sounds. It's a powerful tool for anyone wanting precise stereo control.
PROS
- • Exceptional stereo separation creates wide, immersive soundscapes.
- • Mid-band CV control offers incredibly precise tonal shaping.
- • Flexible frequency range delivers everything from subtle warmth to aggressive edge.
- • XAOC's build quality ensures rock-solid stability and long-term reliability.
CONS
- • 10HP footprint can be restrictive in smaller modular systems.
- • Limited filtering modes compared to more complex multi-mode filters.
- • Requires careful gain staging to avoid unwanted clipping at higher levels.
⭐
4.8/5
AudioFu Score
Specs:
10/10
Detail:
7/10
Value:
7/10
Art. 505959
$294
Doepfer A-121s
by
Doepfer
Audio Processing
Classic Synthesis
Frequency Control
Key Feature:
The A-121s is a workhorse filter module, a classic for a reason. It’s a fantastic starting point for anyone diving into modular synthesis or a reliable addition to an existing system seeking a distinct, vintage-flavored filter. The stereo capabilities and Delta F control really open up creative possibilities.
PROS
- • Classic Doepfer build quality: robust, reliable, and feels immediately familiar.
- • Versatile multimode filtering: seamlessly morphs from low-pass to bandpass.
- • Delta F control adds unique movement and dynamic filtering possibilities.
- • Stereo operation expands sonic palette for wider, more immersive soundscapes.
CONS
- • Can be a power hungry module, demanding a robust power supply.
- • Limited resonance range compared to some modern filter designs.
- • The interface, while functional, is somewhat dated visually.
⭐
4.9/5
AudioFu Score
Specs:
10/10
Detail:
8/10
Value:
7/10
Art. 551513
$284
Tobinski Dual LPG/VCA
by
Tobinski
Classic Synthesis
Subtractive Synthesis
Audio Processing
Key Feature:
The Tobinski Dual LPG/VCA is a seriously useful little module. It’s perfect for sound designers and experimental musicians wanting a pair of classic, warm filters and VCAs in a small package – the saturation on the VCA side is especially nice. It's a great entry point to more complex filtering techniques without breaking the bank.
PROS
- • Excellent dual-channel design maximizes patch flexibility.
- • Model-D VCA emulation delivers authentic, warm saturation.
- • Compact 6HP footprint saves valuable rack space.
- • Fader provides intuitive, hands-on control over key parameters.
CONS
- • Limited routing options compared to more complex filter modules.
- • Power draw, while manageable, could be a concern in smaller systems.
- • The 'Combination' LPG mode can sound muddy in some applications.
⭐
4.8/5
AudioFu Score
Specs:
10/10
Detail:
5/10
Value:
7/10
Art. 621021
$284
Shakmat Modular Dual Dagger
Subtractive Synthesis
Tonal Character
Audio Processing
Key Feature:
The Dual Dagger is a seriously useful little filter module. It's perfect for Eurorack users wanting a compact, stereo filtering solution for shaping basses, drums, or adding movement to pads – especially those with limited rack space but a desire for rich, textured sounds. The build quality is solid, and the sound is surprisingly versatile.
PROS
- • Excellent filter character; creamy low-pass, crisp high-pass.
- • Stereo operation significantly expands sonic possibilities.
- • Compact 6HP footprint maximizes rack space efficiency.
- • Well-executed resonance control offers subtle to aggressive textures.
CONS
- • Limited modulation destinations compared to larger filter modules.
- • 90mA -12V draw is a bit higher, demanding power.
- • Bandpass mode lacks the finesse of dedicated bandpass filters.
⭐
4.8/5
AudioFu Score
Specs:
10/10
Detail:
6/10
Value:
7/10
Art. 521325
$283
ADDAC 604 Dual Filter
by
ADDAC
Frequency Control
Subtractive Synthesis
Tonal Character
Key Feature:
The ADDAC 604 is a surprisingly capable dual filter module that delivers a warm, classic analog sound without taking up a ton of space. It’s a fantastic entry point for those exploring filter design or needing a compact stereo filtering solution, especially those building smaller, focused systems.
PROS
- • Warm, analog tone with a distinct vintage character
- • Stereo operation expands sonic possibilities significantly
- • Compact 6HP footprint maximizes rack space efficiency
- • Cutoff CV input offers excellent modulation control
CONS
- • Limited resonance range compared to higher-end filters
- • Build quality is adequate, but lacks premium component feel
- • Filter modes, while useful, aren’t exceptionally unique
⭐
4.8/5
AudioFu Score
Specs:
10/10
Detail:
5/10
Value:
7/10
Art. 505636
$250
Befaco BF-22 Sallen Key Filter
by
Befaco
Subtractive Synthesis
Tonal Character
Audio Processing
Key Feature:
The BF-22 nails that classic MS-20 filter vibe without the full modular commitment. It's a great way to add some grit and character to your Eurorack, especially if you’re after that raw, aggressive sound, and it's an excellent entry point into more complex filter designs.
PROS
- • Authentic MS-20 filter character, surprisingly warm and musical
- • Versatile 12dB/6dB modes offer broad sonic shaping
- • Link switch creates complex, evolving filter textures
- • Solid build quality with robust pots and reliable switching
CONS
- • 17HP footprint can be limiting in smaller racks
- • Limited input gain range requires careful level matching
- • Resonance can get quite aggressive, demanding careful modulation
⭐
4.8/5
AudioFu Score
Specs:
10/10
Detail:
6/10
Value:
7/10
Art. 466964
$250
Doepfer A-105-4 Quad Poly VCF
by
Doepfer
Sound Shaping
Tonal Character
Classic Synthesis
Key Feature:
The A-105-4 is a solid workhorse for anyone wanting that classic, warm filter sound in a modular format. It's perfect for sound designers and experimental musicians needing multiple filters for lush pads, evolving textures, or gritty soundscapes - it’s a great way to add serious filtering power without breaking the bank.
PROS
- • Excellent resonance character, classic Moog-inspired tone
- • Four filters offer immense flexibility for complex textures
- • Common controls simplify complex modulation routing
- • Robust Doepfer build quality, reliable Eurorack integration
CONS
- • 8HP footprint can be restrictive in smaller racks
- • Limited filter modes compared to some modern alternatives
- • Can be power-hungry, especially in larger systems
⭐
4.8/5
AudioFu Score
Specs:
10/10
Detail:
4/10
Value:
7/10
Art. 463292
$250
Joranalogue Audio Design Flow 3
Sound Shaping
Tonal Character
Frequency Control
Key Feature:
This filter reacts to your guitar or synth with a built-in envelope follower. It offers three filter modes and lets you shape the decay from a quick snap to a slow fade. It fits well in small cases but lacks digital controls.
PROS
- • Built-in envelope follower reacts to audio input instantly
- • Offers three distinct filter modes for sound shaping
- • Adjustable decay time from 100 milliseconds to three seconds
- • Six standard Eurorack width fits tight cases easily
CONS
- • No digital or software interface for programming
- • Limited to three output filter types only
- • Single power rail requirement limits external power options
⭐
4.9/5
AudioFu Score
Specs:
10/10
Detail:
8/10
Value:
7/10
Art. 644332
$245
Make Noise DXG
by
Make Noise
Tonal Character
Sound Shaping
Subtractive Synthesis
Key Feature:
The DXG is a seriously useful module for anyone wanting to add rhythmic complexity to their patch. It's a fantastic stereo gate, perfect for adding movement and pulse to drums, sequences, or even drones—it's a real workhorse for experimental sound design and percussive textures.
PROS
- • Exceptional gate response, offering nuanced rhythmic possibilities.
- • Stereo architecture allows for complex, evolving textures.
- • The normalized input simplifies mono signal routing elegantly.
- • Build quality reflects Make Noise's signature robust, tactile design.
CONS
- • Power draw is relatively high, impacting modular power budget.
- • Limited modulation options beyond the CV attenuator.
- • The direct output on channel 2 can be a little noisy.
⭐
4.8/5
AudioFu Score
Specs:
10/10
Detail:
5/10
Value:
7/10
Art. 583478
$245
Erica Synths Drum Stereo DJ VCF
by
Erica Synths
Classic Synthesis
Subtractive Synthesis
Frequency Control
Key Feature:
This Erica Synths module is a real character piece. The crossfading between low and high pass is incredibly musical and useful for creating evolving textures and rhythmic filtering. It’s perfect for experimental sound design, glitchy percussion, and anyone wanting a unique filter voice in their modular setup.
PROS
- • Unique crossfade creates evolving, dynamic filter sweeps.
- • Stereo operation expands sonic possibilities for textures.
- • Solid build quality; Erica Synths consistently reliable.
- • Resonance control adds character and screaming potential.
CONS
- • 8HP footprint can be restrictive in smaller modular systems.
- • Limited filter modes compared to some more complex offerings.
- • Power draw is moderate; consider PSU capacity.
⭐
4.8/5
AudioFu Score
Specs:
10/10
Detail:
5/10
Value:
8/10
Art. 582844
$238
Erica Synths Black Polivoks VCF V2
by
Erica Synths
Frequency Control
Tonal Character
Audio Processing
Key Feature:
This Erica Synths Polivoks VCF V2 is a fantastic little module for recreating that gritty, Russian synth vibe. It’s a no-frills design, but it nails the aggressive character of the original Polivoks filter, perfect for industrial, experimental, or anyone craving a raw, analog edge in their modular patch. A great choice for those seeking a specific, iconic sound without a huge commitment.
PROS
- • Authentic Polivoks character with original K140UD12 chips
- • BP mode delivers aggressive, resonant sweeps and textures
- • Compact 10HP footprint ideal for space-constrained modular systems
- • Simple, direct controls allow for immediate sonic exploration
CONS
- • Limited filter modes compared to more versatile options
- • Can be quite aggressive and noisy at higher resonance settings
- • No attenuators on CV inputs; signal levels require careful management
⭐
4.8/5
AudioFu Score
Specs:
10/10
Detail:
6/10
Value:
8/10
Art. 420027
$226
NANO Modules ST-FONT
by
NANO Modules
Sound Shaping
Frequency Control
Classic Synthesis
Key Feature:
The ST-FONT is a seriously cool little module for adding stereo movement and character to your patches. It's perfect for sound designers and experimental musicians who want a compact, versatile filter with a bit of edge. It’s a great starting point for exploring stereo filtering without a huge investment.
PROS
- • Stereo filtering dramatically widens soundscapes, adding real depth.
- • The 'Wild' resonance mode delivers satisfying, gritty textures.
- • CV offset control offers nuanced filter modulation possibilities.
- • Compact 14HP footprint maximizes space in tight Eurorack setups.
CONS
- • The drive control can easily overload, requiring careful gain staging.
- • Limited filter modes compared to some higher-end filter modules.
- • The attenuators feel a little plasticky, not the most premium feel.
⭐
4.9/5
AudioFu Score
Specs:
10/10
Detail:
8/10
Value:
8/10
Art. 604124
$223
Every filter modules that matches
69 models match this page. The 15 above are covered in detail; the rest are listed here with their published specifications.
| # | Model | Specifications | Price |
|---|---|---|---|
| 16 | Tiptop Audio Resonator | not published | $216 |
| 17 | Befaco Pony VCF | not published | $211 |
| 18 | Erica Synths Black LPG | not published | $211 |
| 19 | Erica Synths Black 3109 VCF/VCA | not published | $211 |
| 20 | Erica Synths Black Multimode VCF | not published | $204 |
| 21 | TouellSkouarn Kala Goañv | not published | $204 |
| 22 | ADDAC 605 Spectral Tilt | not published | $200 |
| 23 | Bastl Instruments Cinnamon | not published | $200 |
| 24 | Endorphin.es Squawk Dirty To Me | not published | $200 |
| 25 | Endorphin.es Squawk Dirty To Me Silver | not published | $200 |
| 26 | Befaco Bandit | not published | $193 |
| 27 | Doepfer A-121d VE | not published | $188 |
| 28 | Intellijel Designs SVF 1U | not published | $180 |
| 29 | Doepfer A-108 | not published | $176 |
| 30 | Doepfer A-106-6 XP Filter | not published | $170 |
| 31 | Doepfer A-121d | not published | $165 |
| 32 | Doepfer A-101-1 | not published | $159 |
| 33 | Doepfer A-104 | not published | $159 |
| 34 | Tiptop Audio Forbidden Planet Analog Filter | not published | $157 |
| 35 | Doepfer A-121-2 VE | not published | $147 |
| 36 | Doepfer A-120 Vintage Edition | not published | $143 |
| 37 | Doepfer A-121-2 | not published | $143 |
| 38 | Verbos Electronics Noise & Filter | not published | $142 |
| 39 | Doepfer A-106-1 Xtreme Filter (MS20) | not published | $136 |
| 40 | Doepfer A-105-2 | not published | $136 |
| 41 | Doepfer A-105-2 VE | not published | $136 |
| 42 | Doepfer A-124-2 SE | not published | $136 |
| 43 | ADDAC 607 Crossover | not published | $131 |
| 44 | Doepfer A-120 | not published | $131 |
| 45 | Doepfer A-123-2 | not published | $131 |
| 46 | Rides In The Storm L5D | not published | $128 |
| 47 | Doepfer A-101-6 | not published | $118 |
| 48 | Behringer Swords | not published | $113 |
| 49 | Doepfer A-101-2 Vactrol Lowpass Gate | not published | $113 |
| 50 | Erica Synths Pico VCF1 | not published | $113 |
| 51 | Doepfer A-121-3 | not published | $112 |
| 52 | Rides In The Storm HFD | not published | $111 |
| 53 | Doepfer A-124-2 | not published | $108 |
| 54 | NANO Modules FONT | not published | $103 |
| 55 | Doepfer A-103 18dB Low Pass Filter | not published | $102 |
| 56 | Doepfer A-102 | not published | $102 |
| 57 | Shakmat Modular HiPass | not published | $102 |
| 58 | Doepfer A-124 Wasp Filter | not published | $100 |
| 59 | Doepfer A-124 Wasp Filter SE | not published | $100 |
| 60 | Doepfer A-106-5 SEM Filter | not published | $97 |
| 61 | Doepfer A-106-5 SEM Filter Special Ed. | not published | $97 |
| 62 | Behringer 914 Fixed Filter Bank | not published | $59 |
| 63 | Behringer Wasp VCF | not published | $56 |
| 64 | Behringer Multi Filter/Resonator 1047 | not published | $54 |
| 65 | Behringer 121 Dual VCF | not published | $48 |
| 66 | Behringer Filtamp Module 1006 | not published | $45 |
| 67 | Behringer Surges | not published | $41 |
| 68 | Behringer 904A VC Low Pass Filter | not published | $32 |
| 69 | Behringer 904B VC High Pass Filter | not published | $32 |
Filter Modules by the numbers
Measured across all 69 models in this category, so «wide», «short» or «expensive» mean something you can check.
Price
median $147
from $45 to $284
How to Choose the Best Filter Modules
1
Resonance Character
A cheap filter often has a fizzy, uncontrolled resonance that just sounds harsh. We're looking for a sweet spot - a resonance that can get gnarly without turning into digital noise. That sweet spot is critical for basses and pads.
2
Filter Slope (dB/Octave)
12dB/octave filters are common at this price point, and that's okay. But a 24dB/octave filter gives you more aggressive filtering and a steeper cutoff, which can be vital for sculpting sounds or creating sub-bass rumble. Be aware that steeper slopes can also introduce phase issues if you're not careful.
3
Drive/Saturation
Many affordable filters lack built-in drive. This means you'll need a separate distortion module to get that gritty, overdriven character. Modules with built-in drive offer more immediate gratification, though the drive circuit itself may be a bit basic.
4
Keyboard Tracking
Accurate keyboard tracking is a must if you plan on using the filter in a melodic context. Poor tracking results in a constantly shifting tone, which is distracting and unusable. This is often a compromise in cheaper modules.
5
Build Quality & Noise Floor
Let's be honest, plastic enclosures and noisy components are common. A higher noise floor means more hiss and unwanted artifacts, which can bury your signal. It's not always a dealbreaker, but it's something to be aware of.
Buying Guide
At this price point, you're making tradeoffs. Expect simpler controls, potentially a less refined sound, and maybe a slightly less robust build. Don't expect Moog-level warmth or Buchla-style complexity. Focus on modules that nail the core filter characteristic you need, and be prepared to supplement with other modules later. A well-chosen, affordable filter is still a huge step up from a stock synth's filter - it's just about knowing what to prioritize.
How This List Is Built
We don't play these instruments — we're a catalog, not a review desk, and we'd rather say so than pretend otherwise. This page covers 69 filter modules from the Thomann catalogue, which is the largest single source of specification data in this category: 15 in detail, the rest listed with their specifications.
Position is computed, not curated. We parse the manufacturer's own description into actual values — nut width, scale, fret count, fingerboard radius, size, alloy — and rank on them: how many specifications a model has published, how many of them are measurable numbers, and how precisely it meets this page's criterion. A product image adds a little. Price is not a ranking signal: it tells you nothing about whether a neck fits your hand. The same inputs always produce the same order, so nothing here is shuffled to look fresh.
What this list is good for: narrowing a category down to a shortlist by spec and budget. What it isn't: a substitute for hearing an instrument. Before you buy, read hands-on reviews and, where you can, play it. Full methodology.
Frequently Asked Questions
Low-pass cuts highs, high-pass cuts lows, band-pass lets a narrow range of frequencies through, and notch cuts a narrow range. Each has its own vibe and application - low-pass is classic for warmth, high-pass for clarity, band-pass for unique textures.
Most likely, yes. These are generally designed to be Eurorack format. Just make sure your power supply has enough headroom to handle the module's power draw.
Not at all! It's a perfectly valid filter slope. It just won't give you the extreme cutoff characteristics of a 24dB/octave. It's often smoother and more musical, too.
Some noise is unavoidable, especially with cheaper modules. But excessive noise indicates a problem - either a noisy power supply or a poorly designed filter circuit. Try different power rails to see if it helps.
No. Moog filters are legendary for a reason, and that quality comes at a cost. You can get inspired by Moog filters, but don't expect a direct clone. Look for filters that emphasize a warm, resonant low-pass character.
