QuadroPol consists of four voltage-controllable attenuators, which can also be used as inverters, ring modulators, VCAs, or CV sources. Multiple channels can be combined to create a mixer.

QuadroPol comes with four identical attenuators. Each circuit includes an input, a potentiometer, and a CV connector for level adjustment, as well as an output. When the knobs are set to the 12 o’clock position, incoming signals are not passed through the attenuators. The zero point is very broad and therefore easy to reach.

By turning the potentiometers to the right, users can gradually open the circuits. Turning the controls to the left has essentially the same effect but with inverted phase. Thanks to the CV inputs, which operate within a range of -5 V to +5 V, the attenuators can also be controlled by other modules. This feature allows the circuits to be used as VCAs.

The dynamic range is 80 dB. When audio material is fed into both the input and the CV connector of an attenuator, it functions as a ring modulator. If no cables are plugged into the inputs, they are normalized to a fixed voltage. Using the level potentiometers, it is possible to shift the resulting CV signals within the range of -5 V to +5 V. The attenuator outputs can be interconnected via jumpers. As a result, the QuadroPol can be used as a mixer with two to four channels.