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These PSI Audio active acoustic absorbers are game-changers! I used these for bass management in an acoustically difficult room. I have moved to a new house and no longer need them, so am selling them. I prefer these to the C214 as these are purely analog -- they respond by cancelling out the acoustic velocity wave that reaches their front grille, acting as an acoustic window and reducing the development of bass reflections.

There is an excellent review of these by Bob Katz in Stereophile:

The manufacturer's webpage is also very helpful:

Each unit is in essentially mint condition. They were laid on their sides with felt protectors in a non-smoking, pet-free residential environment. I have removed the felt pads and repackaged them in their original boxes, with original power cables, manuals, and testing certificates.

I have two listings posted, as I have two of these available

This item is sold As-Described

This item is sold As-Described and cannot be returned unless it arrives in a condition different from how it was described or photographed. Items must be returned in original, as-shipped condition with all original packaging.Learn More.

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Listed3 days ago
ConditionExcellent (Used)
Excellent items are almost entirely free from blemishes and other visual defects and have been played or used with the utmost care.Learn more
Brand
Model
  • AVAA C20
Finish
  • White
Categories
Year
  • 2020
Made In
  • Switzerland

Product safety information may be available here.

Great stuff I used to use

Boston, MA, United States
Joined Reverb:2026

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