Products of Befaco

Befaco is an Eurorack manufacturer that also offers DIY kits, organizes workshops and releases their designs under Creative Commons license.

In February 2010 Befaco was created as an open hardware platform focusing on professional DIY musical hardware, materializing the previous electronic, musical and artistic research of its members.

Our main activity has been developing synthesizer modules in eurorack format and making them available in workshops. All this research is published under CC-NC-SA License, so people can download the schematics, and technical assembly guides, to make their own variations of the projects for personal and educative purposes. Also build all our designs during our regular workshops in cities as Barcelona, Madrid, London or Berlin.
During the past twelve years, apart of these regular four cities, we have visited cities as Tokyo, Kyoto, Toronto, Montreal, Chicago, Frankfurt, Helsinki, Lyon, Stuttgart and Amsterdam, amongst many other European cities.

These workshops are a huge test playground where we can track each module being built by different worldwide users, get direct feedback and quickly improve them with, develop new ones, or adapt these instruments to users demands constantly.

Direct contact with DIY enthusiasts allows an implication of users in the structure, allowing them to design their own modules and develop them in a professional way. This has developed into an incubation environment for several new modular initiatives, allowing different makers to start their own similar projects.

Befaco initiative is possible thanks to the support of Hangar, an artistic production centre in Barcelona, Barcelona city hall and the titanic work by the whole Befaco team.

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Befaco - 7U Case

available

This is the DIY kit version of Befaco's 7U Eurorack case, it supplies you with 2 rows of 3U plus 1 row of 1U (3U+3U+1U). For even more detailed info please visit Befaco's website via the button below.Bringing your system into the next level:Equipped with our latest and most sophisticated power supply (Trolley Bus), the Befaco 7U Case supplies up to 5000 mA of power. The rear panel counts with a vast array of connections to pair your system with external devices. Each connector follows the Intellijel format, making them fully compatible with Intellijel’s 1U modules. Designed with a high-quality unibody black anodised aluminum frame, the Befaco 7U case is a slim and sturdy solution to travel with. The included clear PET-G cover keeps your modules safe even patched!Features:• External Dimensions (without cover): 53,5 cm x 31 cm x 8 cm• External Dimensions (with cover): 53,5 cm x 31 cm x 14 cm• Internal Row Dimensions: 2x 3U 104 HP and 1x 1U 104 HP (Intellijel format)• M3 threaded strip• Power supply specifications: +12 V: 5000 mA, -12 V: 2500 mA, 5 V: 4000 mA• Module depth: 53 mm (power supply side), 70 mm (rest of the case)• Module slots: 36• Weight (without cover): 2,6 kg• Weight (with cover): 3,4 kg• Rear connectors: 6x 6,3 mm (1/4“) jack I/O (balanced or unbalanced), MIDI DIN In/Out/Thru, USB Device Type B, Apple compatible USB-A charging ports.• Power brick: 135 W, 2,5 mm Barrel connector center positive (included)• Cover: PET-G Clear cover (included)• Finish: Black anodised aluminum• Vesa 100 format threads. Recommended Vesa stand: >12kg.• Kensington lock
€535.50*
Befaco - A*B+C

available

A*B+C is a dual, four-quadrant multiplier with VC Offset that can act as Dual Ring Modulator, Dual VCA and Four Channel Mixer. Each section can perform the analog multiplication of two signals (A and B) and add an offset (C).Features:• Dual-channel bipolar VCA’s• Adjustable VC Offset per channel.• AM and Ring Modulation capabilities.• Output allows it to work as a four-channel mixer.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
€107.10*
Befaco - AC/DC (discontinued)

sold out at the moment

- - - - Discontinued - - - -AC/DC is a class-compliant DC coupled audio interface in Eurorack format. With its 6 HP, it is perfect for live performance and travel Rigs.Based on Rebel Technology OWL platform, It allows sending and receiving both CV and Audio at 16 Bits 48 kHz. as well as load patches from Rebel’s library.It is compatible with all popular DAW and CV generators, and also as an audio and CV processor for iOS apps.Features:• Class-compliant audio interface• DC coupled with range -10 to 10 V• Level meters and clip LEDs• 48 Khz 16 Bit• Compatible with OWL platform• Stm32H7 processor with 32 Mb of RAMDIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
€199.92*
Befaco - Bananuts

available

Bananuts are anodized alluminium custom minijack nuts, following Buchla/Serge coloring code.Perfect to code your inputs and outputs with colors or just give a touch of beauty to your favorite gear. One bag contains 25 pcs.Compatible Jacks:• PJ301M-12 (Thonkiconn)• PJ398SM (Thonkiconn)• PJ366ST (Green Stereo Thonkiconn)• PJ301BM• PJ398S-BM• PJ301CM• PJ302M• 161-3502L-E (Kobiconn)Features:• Eight colors available following the Buchla/Serge color code: Blue, Purple, Red, Orange, Yellow, White, Green and Black.• Anodized Aluminium• 1 bag = 25 pcs.
€9.20*
Befaco - BF-22

only 1 left

The BF-22 VCF is a dual Hi/Low-pass filter inspired by the Sallen-Key filter from the early MS-20.DISCLAIMER: This filter brings to your modular system the character of early MS-20 sound: Kick-ass-rocking-dirty screams! It inherited not only it’s amazing sound, also MS-20 noise floor. If noise floor is an issue for you, this might not be your filter.Features:• Dual-channel Sallen-Key Filter. Inspired by the early MS-20• High and Lowpass operation.• Two CV inputs per channel with a dedicated attenuverter for the first one.• CV controlled resonance.• The first channel can be linked to the second one with the “Link” switch.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
€146.37*
Befaco - Burst

available

Burst is a trigger processor and generator, designed to add an organic chain of events to your modular setup. You can see it like “Trigger Activated Trigger Burst”. Each time it is activated, either manually or with an external trigger, a given amount of triggers are generated. You can control Time Division, Distribution, Quantity, and Probability of the bursts.• With Burst synced to your tempo, you can create all kind of ratcheting effects and multiplications leading to doubles, triplets, quintuplets, and true Poly Rhythms for your modular system.• With very short time windows, Burst can help to synthesize fast repeating transients for “hand-clap like” sounds or modern drum hits.• Working in Cycle Mode, is also an excellent master clock with tap tempo functionality, and is able to achieve non linear distributed clocks.Features:• Custom trigger bursts up to 64 triggers.• Voltage Control burst Quantity with dedicated attenuator.• One Shot and Cycle play modes activated via manual controls or dedicated Trig Input.• Pingable clock input.• Voltage Control burst Distribution, Time Division and Probability.• Tempo and End of Cycle individual outputs for sync other modules.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
€117.81*
Befaco - ChikiPower

only 1 left

ChikiPower is a USB-C standalone Eurorack Power Supply designed to complement any DIY bench. ChikiPower can provide up to 400mA per rail with a 20W USB charger, making it perfect for driving small setups. Besides its tiny desktop format, Chikipower is a super reliable power supply offering over-voltage and short-circuit protection keeping your devices safe.• Measurements: 54x52x20 mm• Power by USB version: USB 3.0/3.1 – 4.5W, USB BC 1.2 – 7.5W, USB Type C 1.2 – 15W, USB Chargers – up to 20W.• Number of power sockets: 3Features:• USB-C Eurorack Power Supply• Up to 400 mA per rail (when using a USB charger)• Tiny standalone format• Over-voltage and short-circuit protection• High-quality USB-C cable includedDIY-Kit-Type:SMD-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. All SMD parts are pre-soldered, only trough-hole parts to solder. For build guide, more info, videos etc. please check the buttons below.
€94.01*
Befaco - Chopping Kinky

available

Chopping kinky is a voltage controllable, dual channel wavefolder.As an unique feature it has a chop out that will choose between both channels with a zero cross detector or an external gate.• A wavefolder converts simple signals into richer and more dynamically changing ones. In contrast to a filter, wave folding adds harmonic content to the waveform. It works by amplifying the waveform until it begins to saturate, then rather than clipping, the waveform gets folded back in on itself.• Each of the module’s two channels has a unique wave folding profile. At each input, there are two CV inputs for controlling the level of waveshaping including one that passes through an attenueverter.• Chopping Kinky is DC coupled allowing it to be used for both CV and audio duties; to generate harmonics on an audio signal or kinking LFOs and envelopes.Features:• Two unique wavefolder circuits• Two CV inputs per channel, one with attenuverter.• DC Coupled inputs allowing CV signals.• Chop out with zero cross detector.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
€130.90*
Befaco - Crush Delay

only 1 left

Crush Delay v3 is a special Echo-Delay unit based on the PT2399 IC, which is able to offer 400ms of clean delay and up to 2 seconds of dirty repetitions, having a special talent to generate noisy-glitch textures. This third version comes with some interesting new features like redesigned VCAs circuits, wider range for clean delay and reduced depth to make it skiff friendly.• The module has two inputs (In and Return) that go to the Delay circuit through a dedicated VCA for each one. The main difference between both inputs is the signal fed into In is going to the Dry/Wet circuit also, not only to the Delay, allowing you to control the balance between the original and the processed signal present at the main output (Out).• The signal is processed by the Delay circuit, which is affected by the Crush section. It degrades the signal at slow rates in different ways, depending on the position of the three Crush switches or by the presence of gate signals at the Crush inputs.• After being processed, the signal is routed to three different paths. The first one goes into Dry/Wet, where it’s mixed with the original input signal (In) before going to the main output (Out). The second one is returned to the Delay circuit through another VCA (Feedback), controlling the number of repetitions of the wet signal. Finally, the last one goes directly to the Send output.Features:• Input signal controlled by VCA’s• Bigger range of clean delay• Three different Crush Modifiers based on circuit bending techniques.• VC Feedback wit automatic gain controlDIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
€147.56*
Befaco - CV Thing

only 2 left

CV Thing is a fully mappable CV to MIDI converter in just 6HP. Its based on our VCMC module, but aiming for small and compact performance rigs. It has eight inputs that can be mapped to any MIDI message quite easily thanks to its simple and intuitive user interface. CCs, Program change ,V/Oct to Note or Clock are some of the messages that can be configured to easily control MIDI gear from your modular rig.Features:• Class-compliant USB MIDI and TRS connectors.• TRS to DIN5 Type A adaptor included.• 8 CV inputs.• Controls fully mappable to any MIDI message (CC, Notes, Program change, Clock, ST/SP, NRPN…)• Configurations are saved both in internal memory and via Sysex.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
€176.12*
Befaco - Dual Atenuverter

available

The Dual Atenuverter is a CV/Audio utility module designed to attenuate, invert and apply offset to an input signal.The IN of the first channel is normalled to the IN of the second so it can be used as a two-channel splitter.Features:• The “ATENUVERTER” pot will multiply your signal by 1 when turned clockwise and -1 when turned anti-clockwise.• The “OFFSET” control can add +/- 10V DC to the output. Useful as a manually controlled DC source when no input is connected.• Bicolour LEDs glow red when the output is positive and green when negative meaning this module works well as a CV monitor.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
€59.50*
Befaco - EVEN VCO

available

The EVEN VCO is a voltage-controlled oscillator that offers stability and high precision tuning over 10 octaves. A redesigned temperature compensation circuit maintains the oscillator stable against voltage and temperature drops.Features:• 10 position octave selector• 1 cent precision tracking on the whole octave range.• Triangle, Ramp, Sine, PWM and Even outputs.• Hard Sync input• Two V/Oct inputs• Linear FM input• PWM CV inputDIY-Kit-Type:SMD-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. All SMD parts are pre-soldered, only trough-hole parts to solder. For build guide, more info, videos etc. please check the buttons below.
€130.90*
Befaco - Excalibus

only 2 left

Excalibus is a skiff friendly compact power supply and bus. Specially designed for medium portable systems, offering a great balance between space, power and stability!Specs:• Input: 9 – 18v (Recommended 45W)• Current: +12V: 1,25 A, -12V: 1,25 A, +5V: 350 mA• Measurements: 50mm x 400mm x 12mmFeatures:• 12mm tall• Horizontal connectors to maximize space• 2,5mm barrel power connector• On/Off buttonDIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
€105.91*
Befaco - FX Boy

available

A Multi FX module based on game carts!Fx Boy is a multi-FX module designed in collaboration with several talented manufacturers. This is an effect unit with CV control over the parameters and dry/wet control,  with a Built-in CV controllable four bands EQ.Each effect is physically hosted in a hot-swappable game cart and designed by a different manufacturer: Touell Skouarn with Skuara a harsh fuzz with overdrive, Instruo with micro Phaser, a two-flavoured Phaser, Feedback modules with a vintage Flanger, XOR with FX-Girl, a digital double effect module: Delay + Granularizer, Making sound machines with an analog Wave folder, Tesseract with a bit crusher and Befaco Trash distortion!Please note that the cards add current consumption on top of the values stated here.Features:• CV control over all parameters and dry/wet• CV controllable four-band EQ, routable post or pre-effect.• Selector for two different flavours of each cart.• Open specifications to design your own carts• Hot swap for all carts. (A tiny pop can occur depending on the cartridge design)DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
€359.00*
Befaco - Hexmix

only 1 left

Hexmix System is a six channel performance mixer specially designed for Eurorack.The system has two separate modules, the core of the mixer: Hexmix that has six channels with three band EQ, mute, pan and EQ section on the master, and Hexpander that add three auxiliar sends per channel, PFL, individual outs and balanced output.The mixer has a strong inspiration in classical DJ mixers, providing sharp EQ’s for enhanced performance, auxilliar send for effects and individual outputs to record your performance per channel.The system is designed to be placed in 6U, instead of the traditional 3U paradigm in Eurorack. So we will have every feature for each channel vertically as a conventional tabletop mixing deck.Six channel mixer with three band EQ, vactrol mutes, pan and volume control per channel.Inputs for every channel are located at left side of Hexmix. Each jack is normalized to a VCA Expander connection in the back, so if you have a Hexmix VCA , you will have the output of each VCA to every input. connecting a jack in any input will disconnect whatever is coming from VCA.Gain is set to unity, so it will act as an attenuator of the input signal. Mutes are clickless, as they are vactrol based. This circuit provide some decay on the mutes, rather than a sharp cut.Swithces have latch position and momentary ones to unmute the channel, providing some really nice performative capabilities.EQs are quite sharp (12dB) inspired in classic dj mixers to aggresively cut selected frequencies.Master section has it’s own EQ and volume control for the mix of all channels. Master EQ is softer than individual channel’s (6dB) and it’s meant to provide control over the final mix.It’s possible to change output level from line to synth with a switch located in the back.This will be pretty useful when used in combination with hexpander, that provides a balanced out at line level. Like this its possible to have a mix at synth level to re-route the master signal while having an output to PAFeatures:• Six Channel Performance Mixer• Three Band EQ per channel inspired in classical DJ mixers• Vactrol based mutes with momentary action.• Pan and Volume control• VCA Expander connection to plug every channel of an Hexmix VCA directly.• Selectable Line or Modular output level.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
€312.97*
Befaco - Hexmix VCA

available

Hexmix VCA is a compact six channel VCA with an unique response curve range from logarithmic to linear and to exponential using a pot.All outputs are routed to output six to act as a mixer, with a normalization of each one to remove each channel from the Mix.The module can act as six independent VCAs as well as a Mixer for all the inputs (Selectable via a switch).Every VCA has a response pot for the incoming CV, being full logarithmic at maximum setup and full exponential at minimum setup, having the linear response in the center position.Level pot of each channel is an attenuator of the signal coming out of each VCA.Jacks are normalled to 10 volts, so when we have no CV present VCA would be fully open and our Level pot will act as a volume.Features:• 6 channel VCA• Linear, exponential and logarithmic response.• Selectable mixer function.• Expander connection to plug every channel of an Hexmix VCA directly.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
€195.16*
Befaco - Hexpander

only 1 left

Hexpander adds great functionality to Hexmix module. Featuring Three aux send with stereo returns, individual outputs for each channel, complete PFL system and balanced output.Hexpander is designed to be placed on top of Hexmix. Expanding Eurorack concept to 6U, allows every channel to be aligned as in traditional tabletop mixers.Features:• Three auxiliar sends with stereo returns and individual controls per channel.• Pre and Post Fader/EQ outputs.• Selectable Line/Modular level at return inputs.• Monitor section with PFL per channel.• Individual PostEq output per channel.• Master section with Headphones amp and balanced line outputsDIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
€265.37*
Befaco - InAmp

available

Inamp is a dual pre-amp in just 4 HPs. Featuring 6,3 Jacks inputs as well as Minijacks.The unit is designed to amplify up to x20 the input signal, allowing to amplify most of the music machines out there (Domestic line levels) as well as some guitars (Humbucker-like pickups and so).DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
€76.16*
Befaco - Instrument Interface

available

Instrument Interface is an eurorack pre-amp capable to bring any type of audio signal to modular levels thanks to its amplification circuit.The module can drive regular and condenser microphones (+48V Phantom Powered) as well as Instrument and Line signals with a very low distortion ratio.Instrument Interface offers some additional extra functions like a Trig/Gate extractor and Envelope Follower circuits, allowing you to use the character of your audio signal in more creative waysFeatures:• Neutrik combo Input• Phantom Power selector• Input Impedance selector• Separated Audio en Envelope Level controls.• Envelope Follower with attack and decay control• Gate and Trigger Extractor with threshold selector.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
€154.70*
Befaco - Joystick

available

A compact attenuverting (attenuator-inverter) joystick controller and Gate Generator. With it, you can generate and process two control voltages using only one hand. Provided controls for CV ranges and offset adjust the boundaries of your control, this way it never gets out of the desired range, ensuring sensibility and playability even with wild performance gestures.Features:• Robust arcade style joystick for manually generating either CV with Range and Offset control or attenuating two input signals• Two push buttons to generate gates manually.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
€113.05*