I own one and i think it's better than anything available. Very Expensive and almost nobody owns them in the states. Has patented DC filtering that nothing else on the market has. Unlimited power reserves, non limiting. Also has filtered and non filtered outlets for digital and analog components. I had the PS Audio 600 which I disliked for about 10 different reasons. Have the Richard Gray unit but, use it mostly for video sources, like my plasma and DVD player. Try this link:
http://www.burmester.de/english/components/power-conditioner-948-infos.html
http://www.burmester.de/english/components/power-conditioner-948-infos.html