AudioFu

Best Filter Modules Under $50 2026

Affordable filter modules under $50 - great value without compromising quality

Last updated: September 4, 2026

⚡ The best filter modules in 2026 are Behringer 121 Dual VCF (top pick), Behringer Filtamp Module 1006 for tighter budgets, and Behringer Surges for pros — selected from 5 options, priced $32–$48, ranked by brand, price and popularity.
PRICE RANGES: Under $50 Under $100 Under $200 Under $300 Under $500 Under $800 Under $1,000
SKILL LEVELS: For Beginner For Intermediate
BRANDS: Doepfer Behringer Erica Synths ADDAC AJH Synth Tiptop Audio
Behringer 121 Dual VCF - Professional Music Instrument Photo
#1

Behringer 121 Dual VCF

by Behringer
Tonal Character Frequency Control Audio Processing
Key Feature:
This Behringer 121 Dual VCF is a seriously cool way to get that vintage inSystem vibe in your modular system. It's a fantastic value for anyone wanting a warm, characterful filter sound, especially if you’re into experimental sound design or recreating classic synth tones – it's a real workhorse for the budget-conscious modular enthusiast.
PROS
  • • Authentic inSystem 100Min recreation delivers a classic, warm filter tone
  • • Dual filter design enables complex, evolving soundscapes and parallel processing
  • • Flexible 3-mode HP filter adds significant tonal shaping options
  • • Extensive CV inputs and attenuators allow for deep modulation possibilities
CONS
  • • Plastic housing feels noticeably less robust than higher-end Eurorack modules
  • • Limited HP modes compared to more versatile filter designs
  • • 40mA current draw might stress power supplies in smaller systems
⭐ 4.8/5 AudioFu Score
Specs:
10/10
Detail:
5/10
Value:
9/10
Art. 489405
$49
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Behringer Filtamp Module 1006 - Professional Music Instrument Photo
#2

Behringer Filtamp Module 1006

by Behringer
Tonal Character Subtractive Synthesis Audio Processing
Key Feature:
The Filtamp 1006 is a surprisingly capable little module. It delivers a warm, classic filter tone and the built-in VCA makes it a complete sound source. This is a fantastic entry point for beginners exploring modular synthesis, or a budget-friendly utility for experienced users.
PROS
  • • Excellent 24dB filter character, reminiscent of classic Moog designs
  • • Integrated VCA provides a complete voice-like functionality
  • • Affordable price point opens modular synthesis to more users
  • • Compact 16HP footprint maximizes space in Eurorack systems
CONS
  • • Plastic construction feels less robust than higher-end modules
  • • Limited filter modes restrict sonic versatility compared to pricier options
  • • Attenuators on CV inputs could benefit from finer resolution
⭐ 4.9/5 AudioFu Score
Specs:
10/10
Detail:
5/10
Value:
10/10
Art. 501739
$45
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Behringer Surges - Professional Music Instrument Photo
#3

Behringer Surges

by Behringer
Subtractive Synthesis Classic Synthesis Audio Processing
Key Feature:
The Behringer Surges is a surprisingly capable filter module for the price, clearly inspired by Mutable Instruments' Ripples. Its sound is warm and musical, perfect for adding character to evolving textures or creating resonant sweeps – a real boon for experimental electronic music producers and those exploring modular synthesis on a budget.
PROS
  • • Excellent filter character, recalling classic Japanese synths
  • • Remarkable value, especially considering Ripples inspiration
  • • Flexible slope switch (12/24dB) offers tonal versatility
  • • FM input and self-oscillation expand sound design possibilities
CONS
  • • 8HP footprint can be limiting in smaller modular systems
  • • Analogue circuit might exhibit slight drift over extended use
  • • Gain control on one input could introduce unwanted noise at high levels
⭐ 4.9/5 AudioFu Score
Specs:
10/10
Detail:
8/10
Value:
10/10
Art. 603379
$42
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Behringer 904A VC Low Pass Filter - Professional Music Instrument Photo
#4

Behringer 904A VC Low Pass Filter

by Behringer
Subtractive Synthesis Tonal Character Sound Shaping
Key Feature:
This Behringer 904A nails that classic Moog ladder filter vibe, offering a surprisingly rich and expressive sound for the price. It's an absolute steal for experimental electronic musicians, modular beginners, or anyone wanting a seriously characterful low-pass filter without emptying their wallet. The resonance is particularly fun to play with.
PROS
  • • Classic Moog-inspired tone at a fraction of the cost
  • • Versatile resonance sweeps create pronounced, musical filtering
  • • Three frequency ranges offer broad sonic sculpting possibilities
  • • Compact 8HP footprint maximizes space in tight Eurorack setups
CONS
  • • Plastic construction feels less robust than higher-end filter modules
  • • Limited input headroom can cause distortion with strong signals
  • • CV inputs lack fine-tuning control for precise filter modulation
⭐ 4.8/5 AudioFu Score
Specs:
10/10
Detail:
4/10
Value:
10/10
Art. 490741
$33
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Behringer 904B VC High Pass Filter - Professional Music Instrument Photo
#5

Behringer 904B VC High Pass Filter

by Behringer
Classic Synthesis Tonal Character Sound Shaping
Key Feature:
This filter is great if you need a compact, cheap way to cut low frequencies in your rack. You can automate the cutoff with three CV inputs, and the two frequency ranges give you quick options. It works well as a simple tool, but the lack of gain and resonance controls means you won't get deep sound shaping. Perfect for beginners or those who just need to remove bass.
PROS
  • • Two distinct frequency ranges let you shape tone quickly.
  • • Compact 8 HP width fits tight modular cases perfectly.
  • • Three CV inputs let you automate the cutoff smoothly.
  • • Budget-friendly price makes it accessible for new builds.
CONS
  • • Single high-pass mode lacks low-pass flexibility for full control.
  • • No gain or resonance knobs limit shaping the filter voice.
  • • Modular form adds cost and complexity compared to standalone units.
⭐ 4.8/5 AudioFu Score
Specs:
10/10
Detail:
4/10
Value:
10/10
Art. 490739
$33
Check Price

Filter Modules by the numbers

Measured across all 5 models in this category, so «wide», «short» or «expensive» mean something you can check.

Price
median $42
from $33 to $45

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 5 filter modules from the Thomann catalogue, which is the largest single source of specification data in this category: 5 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.

How to Choose the Best Filter Modules

Budget Planning

  • • Under $200: Entry-level
  • • $200-$500: Intermediate
  • • $500-$1000: Advanced
  • • $1000+: Professional

Quality Check

  • • Sound clarity & tone
  • • Build materials & finish
  • • Hardware durability
  • • Overall craftsmanship

Key Features

  • • Your musical style
  • • Skill level match
  • • Intended use case
  • • Brand reputation

Frequently Asked Questions

Key factors include build quality, sound characteristics, playability, brand reputation, warranty coverage, and value for money. Consider your musical style, skill level, and intended use to find the best match.
Budget depends on your needs and experience level. Beginners can find quality options for $200-500, intermediate players should consider $500-1500 range, while professionals often invest $1500+ for premium features.
Higher-priced filter modules typically offer better materials, craftsmanship, and performance. They're worth it if you're serious about music, perform regularly, or need professional-grade features.
Top brands combine quality, innovation, and reliability. We evaluate brands based on build quality, sound performance, durability, and customer satisfaction to recommend the best options for different budgets.
Both have advantages. Online offers better prices and selection, while stores allow hands-on testing. We recommend researching online first, then testing in stores if possible. Many online retailers offer excellent return policies.

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