Behringer 121 Dual VCF

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Eurorack Module

Authentic reproduction of the original "System 100M" circuitry
2 Low-pass filters with cut-off frequency and resonance control
Each filter has 3 audio outputs and 3 CV inputs with attenuators
Each VCF has an additional switchable 3-mode high-pass filter
3-Channel mixer per VCF allows independent mixing of all input signals
Current requirement: 40 mA +12 V, 40 mA -12 V
Width: 16 HP

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3-Year Thomann Warranty

Available since May 2020

Item number 489405

Sales Unit 1 piece(s)

Width 16 TE / HP

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57 Customer ratings

5 36 Customers 4 15 Customers 3 5 Customers 2 1 Customer 1 0 Customers

4.5 / 5

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34 Reviews

Behringer 121

acerimmer 19.03.2022

As all of the Behringer System 100 modules, this one is no exception.
Build quality is great, ease of use is good and overall performance is excellent. I have all of the system 100 modules in my setup and all have been well built. Price point is good, especially from Thomann.
If you are looking at modular (and this is my first time with modular) I could recommend these modules. I know there are so many available selections out there and it is hard to chose but from a price point, these are a good value to start with.
Enjoy!

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Nice and mellow sound

MassimoDavi 11.06.2020

The 121 Dual VCF is an interesting module, which I would rate as a Behringer product rather than a clone. The LP filter sound is smooth and pleasant, never harsh. The resonance has a nice timbre until it gets into self-resonance. The module offers an HP filter as well with 3 different selectable cut-out levels. The 3 way mixer is the winner feature here as it allows you to mix different audio signals within the module, each IN has an attenuator. Sliders a re smooth and precise. The only hing I find awkward is the size of the knobs which are very small and once the unit is patched it is very hard to reach them but for the price vs performance I would just take it as it is.

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Product delivers that Roland System 100 VCF precisely

HomeEngineering 10.01.2024

If you're looking to bring a classic filter to life in your modern eurorack setup at minimal price, Behringer provides the way. Arguably as high quality or better than any offerings from Roland themselves, who have frankly ignored the Eurorack market at their own loss. Behringer is committed to reviving the classic Roland and Moog modular synthesizers of the 70s and making high quality, modern, careful recreations of all of their models and more.

Getting your hands on a real 121 Roland module in working condition from the 70s, provided you even have the right place to rack it safely, will cost you upwards of $1000 and not be different in any noticeable way except perhaps that single unit's own wear from 50 years of being on this earth.

Roland's own revival would be their, confusingly renamed "SYS-521" Eurorack module and frankly, the look and feel is less like the original, and it costs 5x as much as this Behringer unit. Save yourself the money - if this is the filter you want, go Behringer..

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kamielh 13.08.2020

Very clean sounding jup8 style filter, times two. The only real negative is that the input levels are low biased, it takes effort to overdrive this thing, and consequently for this filter topology in general if you increase resonance the output level tends to lower significantly. That said, I love it, 3 sig inputs with attenuation, 3 control inputs with attenuation. 2 outputs. Yesss! Long time ago I found a system 100 samplepack and mesmerized by the sweet, pristine, deep and liquid cutting nature of this filter. So yeah this thing does not dissappoint, even if it contained one filter its worth the money, but hey you get two. Selfoscillation occurs kind of abruptly but I don't mind. The selfoscilation is always very controlled and sweet. The whole ergonomics is very natural, compact and to the point, as in a total joy to use. As it's all surface mounted so modding seems unappealing although I might get into bypassing some input resistors to crank up the gain.

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