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Sweetwater
4.5 (1)
$48.90
Amazon
4.4 (61)
$48.90 Used
Reverb
$48.90 New
$30.00 Used
Thomann
4.5 (62)
$41.00

Average Price: $44

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Based on price data from 3 merchants for "Behringer 121 Dual VCF Eurorack Synthesizer Module". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

Experience the sonic charm of yesteryears with the Behringer 121 Dual VCF Eurorack Synthesizer Module. This meticulously designed Eurorack module brings the authentic reproduction of the iconic "System 100M" circuitry to your fingertips, letting you explore the rich, analog filter sounds that defined electronic music in the 1980s.

The heart of the 121 features two independent voltage-controlled filters (VCFs), each equipped with low-pass and high-pass modes, allowing you to sculpt your sound with precision. Whether you're aiming for smooth, warm tones or more aggressive, resonant textures, the dedicated cutoff and resonance controls offer a wide palette for sound shaping. With three audio outputs and three control voltage (CV) inputs per filter, the 121 lets you dive into complex modulations, perfect for creating intricate soundscapes and dynamic performances.

Designed to seamlessly integrate into your Eurorack setup, this module opens up endless possibilities for sound design. Connect it with your existing gear to infuse your music with the vintage character and warmth that have become synonymous with classic analog synthesizers. Whether you're an experienced modular enthusiast or just beginning your journey, the Behringer 121 Dual VCF offers a versatile and cost-effective way to enhance your sonic toolkit.

Key Features:

  • Authentic reproduction of the classic "System 100M" circuitry
  • Two low-pass filters with individual cutoff and resonance controls
  • Each VCF includes a switchable 3-mode high-pass filter
  • Three audio outputs and three CV inputs with attenuators for each filter
  • 3-channel mixer per VCF for independent signal mixing
  • Compact 16HP width for efficient Eurorack integration
  • Power requirement: 40 mA +12 V, 40 mA -12 V

Product specs

Type Dual VCF Eurorack Module
Depth 1.5" (39mm)
HP Size 16HP
Power Usage ±12V/40mA
Power Supply Requires Eurorack case and power supply

FAQs

What does the Behringer 121 Dual VCF module offer in terms of sound shaping capabilities?

The Behringer 121 Dual VCF module provides two independent voltage-controlled filters, allowing for complex sound shaping with low-pass and high-pass filter modes. This enables a wide range of tonal possibilities, from subtle filtering to dramatic sweeps.

Is the Behringer 121 Dual VCF module compatible with other Eurorack systems?

Yes, the Behringer 121 Dual VCF module is designed to be fully compatible with the Eurorack format, fitting into any Eurorack case and requiring a standard ±12V power supply.

What is the power consumption of the Behringer 121 Dual VCF module?

The Behringer 121 Dual VCF module has a power consumption of ±12V/40mA, making it efficient for integration into most Eurorack setups without significantly impacting overall power usage.

How much space does the Behringer 121 Dual VCF module take up in a Eurorack case?

The Behringer 121 Dual VCF module occupies 16HP in a Eurorack case, which is a standard size for dual VCF modules, allowing for easy integration into existing setups.

What are the primary uses for the Behringer 121 Dual VCF module in a modular synth setup?

The Behringer 121 Dual VCF module is ideal for filtering and shaping synthesizer tones, offering both low-pass and high-pass filtering options. It's suitable for creating dynamic soundscapes, rhythmic patterns, and evolving textures in modular synth environments.

Behringer

Behringer

Behringer System 100 – 121 Dual Filter VCF Eurorack Module

Video thumbnail for Behringer System 100 – 121 Dual Filter VCF Eurorack Module by Behringer

Behringer System 100 – 121 Dual Filter VCF Eurorack Module

Behringer

Behringer

Video thumbnail for Behringer 121 Dual VCF - Roland System 100m clone eurorack module by ranzee

Behringer 121 Dual VCF - Roland System 100m clone eurorack module

ranzee

ranzee

Video thumbnail for Behringer 121 Dual Filter Module by synthe sizer83

Behringer 121 Dual Filter Module

synthe sizer83

synthe sizer83

Video thumbnail for Behringer - System 100, 121 Dual VCF - Unboxing and some noise! by 56k Audio

Behringer - System 100, 121 Dual VCF - Unboxing and some noise!

56k Audio

56k Audio

Reviews

PROS

  • Smooth and pleasant LP filter sound

  • High-quality build with precise sliders

  • Includes both LP and HP filters with selectable levels

  • 3-way mixer allows mixing different audio signals

  • Offers great value for the price compared to vintage or competing models

  • Classic design that effectively mimics vintage Roland modules

  • Compact size fits well into Eurorack setups

  • Cost-effective alternative to more expensive brands

  • Widely praised for its robust build quality

CONS

  • Controls can be crowded and hard to adjust in a Eurorack setup

  • Resonance behavior may be disappointing at high levels

  • Small trim pots difficult to work with when patched

  • Knobs are very small and hard to reach once patched

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Behringer 121 Dual VCF Eurorack Synthesizer Module.

Features and functionality

  • The Behringer 121 Dual VCF is noted for its basic low-pass filter functionality, with significant resonance changes occurring only above 60-70%.

    Source
  • The Behringer 121 Dual VCF lacks inherent normalization, necessitating additional modules for standard synthesis tasks, which might complicate setups for beginners.

    Source

User experience

  • Owners frequently use the 121 VCF for creating mellow, plucky acidy timbres by patching a snappy AD envelope to modulate the filter cutoff.

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  • Users mention the Behringer 100 series modules tend to produce standard synth sounds and might require additional modules for more unique tones.

    Source

Use cases and applications

  • The fixed high-pass filter toggles are particularly useful when managing multiple voices, helping to clear the mix by separating bass and mid-high frequencies.

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Comparisons

  • The Behringer 100 modules collectively offer a classic Roland voice, but are considered basic compared to a Plaits clone, which covers a wider sonic spectrum in less HP.

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  • Compared to the Abacus, Four LFO, Swords, and Four Play, the Behringer 100 series may feel limited in creative potential, with the latter offering more versatile patching options.

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Build quality

  • The faders on the Behringer modules, including the 121 VCF, are praised for their good quality, providing a tactile experience comparable to more expensive models.

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Value and pricing

  • While individual Behringer modules are affordable, the total cost of a setup can rival that of more versatile, high-quality single modules like the ALA Pixie.

    Source
  • The Behringer 100 series is affordable but may lead to additional costs for a more expansive setup, potentially matching the price of higher-end single modules.

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Other

  • The Behringer 100 series is often recommended for beginners to learn patching, as it effectively teaches basic signal flows and modular synthesis concepts.

    Source

Setup and maintenance

  • Lack of normalled connections means using multiples or buffered multiples to trigger both envelopes or send 1V/Oct CV to both VCOs.

    Source

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