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Befaco A*B+C V4

Voltage-Controlled Voltage Processor

A*B+C is the ultimate utility for audio and control voltage. It performs multiplication, addition, and attenuation, providing a simple way to create complex signal interactions and timbres.

It is formed by two channels, each of which takes two input signals (A and B), multiplies them (A × B), and then adds a third signal (C) to the result.It is formed by two channels, each of which takes two input signals (A and B), multiplies them (A × B), and then adds a third signal (C) to the result.


  • DC Coupled
  • Signal LED Indicators
  • B and C INs normalled to 5V
  • Current Draw: +12V: 50mA, -12V: 50mA +5v : 0mA
  • Width: 6HP
  • Depth: Assembled version 25 mm
  • Depth: DIY version 35 mm
  • Designed, kits prepared and assembled in Barcelona.