Ecosse - P300 and any of the other PS products in this line, are NOT simply filters. They completely breakdown the AC from the wall to DC and regenerate a new 117VAC/60 Hz (or other) wave, selectable from a sine wave to other more complex shapes as chosen by the user. Unless I am mistaken, PS Audio is the only manufacturer of this type of product for audio use. Perhaps you refer to the Ultimate Outlets?
PS Audio power plants
Can anyone give me some feedback or info regarding the PS Audio power plants. I'm thinking of perhaps getting a P500 and am wondering if anyone can give me their experiences with these units(P300,P500,P600 etc).I am using a Pass X250(which is too much current for Power Plant),a Pass X1 preamp and a Classe CDP10 CD Player which I would connect to the power plant. If anyone has suggestions or advice regarding these power plants or any other power regenerators or conditioners, it would be most appreciated. Thanks