Bound for Sound just published a review of the excellent Foundation Research Line Filters. I saw a demo once in a Home Theater, where a Richard Gray could not deal with some interference in the picture from a projector. The guy plugged the projector into a Foundation Research filter and the interference disappeared! It sounded great on his audio components too.
The guy says that the Richard Gray stuff is good for distributing power in a system, but it is not really all that good as a line filter.
The guy says that the Richard Gray stuff is good for distributing power in a system, but it is not really all that good as a line filter.