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Befaco A*B+C V4 – DIY Kit

Befaco A*B+C V4 – DIY Kit

Regular price €103,00
Sale price Regular price

Product details

Main features

  • Processingtwo channels, each multiplying A by B and adding C
  • CouplingDC coupled for both audio and control voltages
  • NormallingB and C inputs default to 5V when unpatched
  • Usesring modulation, linear VCA, mixer, inverter, attenuator and DC generator

Overview

The Befaco A*B+C V4 DIY Kit is the self-build version of a 6HP Eurorack module that Befaco calls a voltage-controlled voltage processor. It has two identical channels for audio and control voltages. It suits modular users who are comfortable with a through-hole soldering project and want a flexible processing utility in a small amount of rack space.

  • Two channels of A × B + C: each channel multiplies input A by input B, then adds a third signal at C
  • DC coupled: handles slow modulation and static voltages as well as audio
  • Normalled inputs: B and C default to 5V when unpatched, so a channel can work as an attenuator or offset source without extra cables
  • Signal LEDs: two red LEDs over Out 1 and two green LEDs over Out 2 show the signal level
  • Compact: 6HP wide and 35 mm deep including the power connector

With audio, the multiply stage gives four-quadrant amplitude modulation for ring-mod tones. The module can also act as a linear VCA, a signal mixer, a 2x gain stage, a phase inverter or a plain attenuator. With control voltages it works as a voltage-controlled attenuator, CV mixer, inverter, VCA or DC generator. That range makes it a general-purpose module for scaling, offsetting, combining and gating modulation, or for shaping and mixing audio.

The build uses two boards, a main board and a control board. You solder them together and join them with M2 screws and spacers. The panel has four B100K potentiometers, four 3-position slide switches and one 2-position switch. Befaco's assembly guide asks even experienced builders to read every step before starting, and points first-time builders to its introductory how-to material. Befaco also sells a ready-built version of the module.

Specifications· 17 details

Format

Format
Eurorack
Width
6HP
Depth (including connector)
35 mm
Channels
2
Coupling
DC coupled

Controls

Potentiometers
4 x B100K
Slide switches
4 x 3-position
Switch
1 x 2-position
LEDs
2 red (Out 1), 2 green (Out 2)
Construction
Through-hole, two boards (main and control)

Power

Power draw +12V
50mA
Power draw +5V
0mA

General

DIY
Yes
Functions
Modulation, Utility, and VCA
Height
3U
Synthesizer form factor
Control voltage or gate connectivity
,

About the brand

Befaco

Barcelona-based maker of open-source Eurorack modules, sold assembled or as DIY kits. Known for experimental voices such as Oneiroi, hands-on build workshops and designs released under a Creative Commons licence.
Origin
ES
Founded
2010
Products
127
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