WMD C4RBN

$249.00 Price Tier: Standard

4.0 (1)

1 Critic Review

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Page last updated Jun 06, 2026

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We compare 600+ stores and found this item at 1 store. Prices updated June 6, 2026.

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5.0 (2)

$249.00 3 available New

$238.83 2 available Used

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Average Price: $244

Standard/Professional

$149

$350+

Price Tier

In the Modular Synthesizers category, WMD C4RBN is priced in the Standard/Professional range. This is quality gear at a fair price point, suitable for beginners, hobbyists, and pros alike.

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Description

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Designed for the modular enthusiast, the WMD C4RBN is a highly versatile module that will inject dynamic sounds into your synthesis setup. This state-variable filter offers a rich palette of tones, making it a fantastic choice for crafting everything from lush pads to gritty basslines. With its ability to seamlessly morph between low-pass, band-pass, and high-pass filtering, the C4RBN ensures that your sonic possibilities are nearly endless.

The module is built with musicians in mind, featuring a user-friendly interface that allows for immediate creativity. Whether you're a seasoned synthesist or just starting your modular journey, the WMD C4RBN stands out with its wavefolder section, offering an extra layer of harmonic complexity. The C4RBN is also equipped with an intuitive FM input, enabling expressive modulation and expanded sound design capabilities.

For those looking to integrate the C4RBN into a live setup, its compact size and robust build ensure that it's both travel-ready and durable. This module isn't just about creating sound—it's about sculpting it to perfection, giving you the tools to experiment and innovate within your musical compositions.

Key Features:

State-variable filter with low-pass, band-pass, and high-pass modes
Integrated wavefolder for added harmonic richness
FM input for dynamic modulation effects
Compact and durable design, perfect for live performances
User-friendly interface suitable for all experience levels

Product specs

Brand	WMD
Model	C4RBN
Finish	Black
Year	2010s
Made In	United States
Categories	Eurorack Modules and Cases, Synth Modules
Horizontal Pitch	4HP
Modular Synth Format	Eurorack
Synth Module Function	Distortion, Filter, Waveshaper

FAQs

What are the primary functions of the WMD C4RBN module?: The WMD C4RBN module functions as a distortion, filter, and waveshaper in a Eurorack format, allowing for versatile sound shaping and modulation within a modular synthesizer setup.
How much space does the WMD C4RBN occupy in a Eurorack system?: The WMD C4RBN occupies 4HP in a Eurorack system, making it a compact option for users looking to maximize their modular setup space.
Can the WMD C4RBN module be used for both audio and CV processing?: Yes, the WMD C4RBN is designed to process both audio and control voltage (CV) signals, offering flexibility in sound design and modulation possibilities.
Is the WMD C4RBN suitable for beginners in modular synthesis?: The WMD C4RBN offers advanced features like distortion and waveshaping, which may be more suitable for users with some experience in modular synthesis, though dedicated beginners can still explore its capabilities with some learning.

Videos

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WMDevices

WMD C4RBN - Eurorack Filter In-Depth Demo

WMDevices

I Finally Replaced my Eurorack Filter // WMD C4RBN Overview and Jam

Ricky Tinez

Eurorack skinny filter comparison

John Schussler

Pitch Tracking with WMD C4RBN Eurorack Filter Module

WMDevices

The WMD C4rbn filter is NASTY! *small filter with BIG sounds* A Review and Demo

Uncle Gnarly

Reviews

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Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about WMD C4RBN.

Features and functionality

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The C4RBN includes a wavefolder and CV distortion, which enhances its versatility, especially for creating punchy, acid-style tones.
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The Doepfer Xtreme filter offers unique capabilities like adding effects into the resonance path and mixing high and low pass with inversion.
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Neutral Labs Scrat allows for extreme resonance and sound customization with preset cards and individual components like diodes and capacitors.
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The C4RBN maintains the ability to be pinged, a feature appreciated by those transitioning from the discontinued WMD MMF, enhancing its versatility.
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User experience

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The filter mode button on the C4RBN can be frustrating due to its sensitivity and the need for precise timing to switch modes.
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Owners find the SCLPL tedious due to the need to page through each band for programming presets, making it less user-friendly for dynamic filtering.
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Owners who previously enjoyed the C4RBN often yearned for its return after switching to milder filters, highlighting its lasting impact.
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Comparisons

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The C4RBN offers more flexibility than the Steve’s MS-22, though the MS-22 provides more precise sound shaping with separate high and low cutoff points.
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The C4RBN combined with a Noise Engineering Viol Ruina was favored over the ALM M8 Filter for achieving a more aggressive sound.
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The Cinnamon filter, while versatile, was not deemed as special or unique compared to the C4RBN and other options.
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The C4RBN is considered a more potent replacement for the WMD MMF, addressing complaints about the MMF's overly clean sound with a punchier alternative.
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Use cases and applications

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The C4RBN excels as a voice-dedicated filter, while the SCLPL is more suited for EQ and end-of-chain DJ filtering tasks.
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Bastl Ikarie is noted for its input gain feature, adding drive and achieving nastier resonance, especially effective in stereo setups.
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The ADDAC702 Dual VC Filter, though larger, is noted for being the angriest filter, potentially too intense for some setups.
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Build quality

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The C4RBN impresses with its compact design, fitting robust features into just 4hp, offering a powerful option for space-conscious Eurorack users.
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Critic Reviews

New Eurorack module reviews: August round-up | Juno Daily

juno.co.uk

The WMD C4RBN shines as a versatile multi-mode filter that excels with both subtlety and aggression. It handles mild settings gracefully but truly comes alive when driven hard, offering a satisfying squelch reminiscent of classic TB-303 tones. When paired with the WMD Javelin, it creates a dynamic duo that is particularly adept at acid bassline sequencing. While the module’s complexity may intimidate beginners, its user-friendly interface invites exploration without overwhelming. However, some may find its range a bit niche for broader applications. Overall, the C4RBN presents a compelling option for those diving into Eurorack, striking a balance between accessibility and depth.

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