I've been curious and researching the very same topic. Besides Equi-Tech for the balanced power approach, check out the Furman IT series. It appears that they do the same thing for less dinero.
I was reading a magazine today (Nuts & Volts, Poptronic or ? I looked at several...) and they discuss different noise cancellation electrical schemes and pros/cons of each. They included balanced power and power regeneration.
The power regeneration scheme that they showed included a balanced power front-end stage, which indeed appears to be superior. Whether PS Audio or Richard Gray includes a balanced power front-end in their products, I don't know.
Good luck!
I was reading a magazine today (Nuts & Volts, Poptronic or ? I looked at several...) and they discuss different noise cancellation electrical schemes and pros/cons of each. They included balanced power and power regeneration.
The power regeneration scheme that they showed included a balanced power front-end stage, which indeed appears to be superior. Whether PS Audio or Richard Gray includes a balanced power front-end in their products, I don't know.
Good luck!