A*B+C Assembled Module

Assembled Version of our four channel A*B+C, ready to mount in your rack.

Package include 12″ power cable and Knurlies.


130,00 €


The A*B+C is a dual, four-quadrant multiplier with VC Offset.


Each of the two sections of the module is capable of performing the analog multiplication of two signals (A and B) and add 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 first section is routed to the output of the second (when the first's output is unused), so the second output can act as 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.


For further information about this module, please see the User Manual.

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

Designed and assembled by hand with love in Barcelona.

The A*B+C is also available as a DIY kit.

Current draw40mA at +/-12V rails
Size | HP6HP
Depth (inc. connector) | mm30mm
Weight | g178g

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