Anyone heard of Powervar conditioners?

I have used one on my computers for over ten years. I tried it on my low power Preamp, CD player and CATV box. The results were extremely clean, but there was noticable audio and video dynamic range compression. It did benefit by upgrading its stock power cord. However, I now use a Tara Labs AD/10B for my audio and video system, but the Powervar is still powering my computer.

The compression I noticed was a more 2-dimensional soundstage. The front to back depth was noticably more forward, although very very clean and quiet. I have a much older model Powervar, late 1980s vintage, maybe the newer ones do not have this issue.