A*B+C Partial Kit

A*B+C Partial Kit


The partial kit of our A*B+C module. Includes PCB/Panel Set + Rare parts.

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 of the two sections of the module is capable of performing the analog multiplication of two signals (A and B) and adding an offset (C). It can also act as a dual voltage-controlled attenuverter, dual-ring modulator, dual VCA, or four-channel mixer (see block diagram below).

The B inputs are routed to an attenuverter that multiplies the signal between -2 to 2, while the offset inputs (C) route through a unity gain attenuverter (multiplies the signal between -1 and 1).

The output of the first section is routed to the output of the second (when the first's output is unused), so the second output can act as a master to achieve (A1*B1+C1) + (A2*B2+C2) or (A1 + C1) + (A2 + C2) - a 4 channel mixer.

The through-zero (four-quadrant) multipliers in the A*B+C allow for true Ring Modulation. To achieve this, simply connect two waveforms to the A and B inputs.



This Partial kit contains:

1 A*B+C PCB Set
4 Potentiometer Single gang 100k Linear PCB
2 Knob Davies White T36 Shaft
2 Knob Davies Red T36 Shaft
8 Jack 3.5mm Mono PCB
6 Black Bananuts
2 Red Bananuts
4 Black Banuanut for Pots

For further information about this module, please see our Website

For documentation relating to older versions of this module please contact: support@befaco.org

Designed with love in Barcelona.

Size | HP
Depth (inc. connector) | mm
DIY Level
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