doepfer/a-183-2

A-183-2 Offset-Generator / Attenuator / Polarizer

Voltage offset generator combined with an attenuator/polarizer. A toggle switch selects between attenuator and polarizer (attenuverter) modes. The DC offset is adjustable via the Offset knob, and the input signal can be attenuated or bipolar-scaled and added to the offset voltage.531

Capabilities 4

Attenuatorattenuator: In Attenuator mode (Att. switch position), the lower knob scales the input from 0 (fully CCW) to full level (fully CW), with gain range 0 to +1.531
Attenuverterattenuverter: In Polarizer mode (Pol. switch position), the lower knob acts as an attenuverter with gain range -1 to +1. Center is zero; CW adds non-inverted input; CCW adds inverted input.531
Offset Generatoroffset-generator: The Offset knob generates a DC voltage in a jumper-selectable range of 0..+5V or -5V..+5V, which is summed with the attenuated/polarized input signal at the output.531
Polarizerpolarizer: Polarizer mode allows the input signal to be attenuated and phase-inverted. The knob's center gives zero output; the polarity flips across the center position.531

Jacks 2 — 1 in / 1 out

Name	Signal	Voltage	Description
Inputs (1)
In	cv	—	531
Outputs (1)
Out	cv	—	Two physically connected output sockets presenting the same voltage — acts as a passive multiple. Outputs the sum of the DC offset voltage and the attenuated/polarized input signal.531

Parameters 4

Name	Type	Range	Behavior
Att./Pol. Knob	knob	—	In Attenuator mode, scales the input signal from 0 (fully CCW) to maximum (fully CW). In Polarizer mode, center position gives zero output; right of center adds the input signal; left of center subtracts (inverts) the input signal. The distance from center defines the intensity.531 Zones attenuator Zero Zero -100–-100%Fully CCW: zero level (no input signal passed).531 polarizer Subtracts (Inverted) Adds (Non-inverted) Subtracts (Inverted) -100–0%Left of center: the In signal is subtracted from (inverted relative to) the offset voltage. At fully CCW, the inverted input is added at maximum level.531 Adds (Non-inverted) 0–100%Right of center: the In signal is added to the offset voltage. At fully CW, the non-inverted input is added at maximum level.531
Mode Switch	switch	—	Toggle switch that selects between Attenuator mode (Att.) and Polarizer mode (Pol.). Determines whether the lower knob acts as a standard attenuator (0 to +1 gain) or a polarizer/attenuverter (-1 to +1 gain).531
Offset	knob	—	Sets the DC offset voltage at the output. Range is jumper-selectable between 0..+5V or -5V..+5V. This offset is summed with the attenuated/polarized input signal.531
Offset Range Jumper	jumper	—	Selects the voltage range of the Offset knob. Upper jumper position: 0..+5V. Lower jumper position: -5V..+5V.531

Firmware history 0 versions

No firmware history recorded.

References 1

[531]
Doepfer A-183-2 Offset-Generator / Attenuator / Polarizer product pageproduct_page
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● verified 2026-05-19