I didn't use any power conditioning before I tried an Equi=Core 300 and Matrix outlet strip, now I understand the need for these products. My system has blacker, quieter backgrounds, more subtle detail, wider & deeper soundstaging, a more relaxed presentation and ease of listening, with no reduction of dynamic contrasts. The price is very reasonable and significantly less than most other similar devices.
As I understand it, the E=Q takes the 120V line and using only a specially designed transformer, splits it into 2, 60V halves of opposite phases, drains the noise off to ground, and reconnects the halves for a quiet 120V output. I probably have part of the explanation wrong, but that is the gist of how it works, no fancy circuitry, just solid engineering and transformer wizardry. Maybe Mark can add some more information.
As I understand it, the E=Q takes the 120V line and using only a specially designed transformer, splits it into 2, 60V halves of opposite phases, drains the noise off to ground, and reconnects the halves for a quiet 120V output. I probably have part of the explanation wrong, but that is the gist of how it works, no fancy circuitry, just solid engineering and transformer wizardry. Maybe Mark can add some more information.