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803 Quadraphonic Spatializer - 14HP

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Item: N13-4995

Availability: In stock



803 Quadraphonic Spatializer - 14HP


This is ADDAC's Quadraphonic output module.

Using the VBAP (Vector-Based Amplitude Panning) principle it allows positioning of a mono signal over a quadraphonic speaker array for sound spatialization. The VBAP algorithm can be controlled by Cartesian or Polar methods.

The sound path is fully analogue featuring 4 high quality VCA's.Contains both 1/4 inch and 3.5mm jacks for adapter free connections.

Four 16-bit CV outputs mirror the signal sent to the VCA's control, when connected to 4 external VCA's these can be used for Polar Mixing of 4 different sound sources.

The 2 Filter CV outputs react according to the distance from the center point. The + output increases as the sound gets further away from the center of the room allowing to sync a Low Pass Filter to the input sound so that as it moves away from the center the High Frequencies get attenuated further increasing the spatialization experience. Another good practice would be to sync a reverb dry/wet signal as well so that the sounds gets more difused as it moves away from the center into the horizon.

Both the filter and the reverb should be plugged between the sound source and the 803, in order for the incoming sound to be processed before being routed to the 4 outputs.

The X and Y CV outputs mirror the cartesian sound position between 0 and +5v.


  • Vector-Based Amplitude Panning quadraphonic spreader
  • Controlled by Cartesian or Polar methods
  • 4 fully analog high quality VCAs
  • Four 16 bit CV outputs that mirror the signal sent to the VCA's control
  • 3.5mm and 1/4" output jacks for use with any speaker

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  • Eurorack Module
  • Width: 14HP
  • Depth: 6 cm
  • Current Draw: 150mA@+12v, 100mA@-12V

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