In this months Stereophile Magazine vetaran engineer Bob Katz talkes about PSI AVAA. This is what he posted on his Facebook page:

"It's remarkable technology that perform so well you think it breaks the laws of physics. There's nothing else on the planet that comes close to the performance of this patented technology. Sonically it has taken my room to a level of sonic accuracy that I never thought could be attained without some serious compromise, usually and overdamped room in the mid frequency and high-frequency decay time"

It comes as no no surprise Bob Katz bought the units he tested.