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Behringer CP3A-O Oscillator Controller Eurorack Module

SKU #L77498000000000
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Eurorack-compatible analog oscillator control module

The Behringer CP3A-O module for Eurorack features four routing switches that enable users to send control voltages to one or more oscillators. Switches 1 to 3 are connected to control inputs 1, 2 and 3—switch 4 can be used to route an external control voltage signal via a 3.5 mm TS plug and can be controlled by an attenuator knob. This single module can drive multiple oscillator modules like the Behringer 921A or B, all conveniently sized to fit a single Eurorack.

Flexible Inputs and Outputs

Players can route up to three external control voltage signals to any of the three summed control inputs. Signals from these inputs can be combined by flipping any of the matching routing switches on. The parallel jacks at the bottom will route the final combined voltage signal to any module they’re connected to.

Authentic Circuitry, Modern Flexibility

This module belongs to a series from Behringer, bringing authentic reproductions of the circuitry from the modular 55, 35 and 15 series to the Eurorack format. Since the 1970s, these synths have been used by some of the world’s most famous pop, rock and jazz musicians. Now, musicians can build their very own, unique synthesizer that can fit in a standard Eurorack case for a very affordable price. Mix and match specific modules to create a personal sound to complement any genre of music.

Eurorack Ready

Installing the CP3A-O is simple, as it was designed to fit into a standard Eurorack case. Just connect the power cables to the power supply and screw in the module using the included screws. This allows for the CP3A-O to be mixed with other synth modules for a truly unique setup.


  • Eurorack module with four switches to send CV to one or more oscillators
  • External input jack with dedicated attenuator control
  • Three switched and summed CV inputs for frequency control of VCO modules
  • Three parallel CV outputs can drive multiple 921A/B oscillator modules
  • From a series of modules inspired by the System 55, 35 and 15 series synths
  • Reproduces sounds from famous pop, rock and jazz records beginning in the 1970s
  • Designed and engineered in the United Kingdom

An authentic addition to your Eurorack. Order now.


CP3A-O Oscillator Controller Eurorack Module Specifications:

Eurorack requirements
  • 8 HP
  • 5 mA +12 V
  • 5 mA -12 V

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