Bob pretty much answered it. Just going to add that most balanced core filtering devices do not limit current transfer such as the Audio Magic Stealth. Also, PS Audio Ultimate Outlet and Blue Circle Music Ring are these types of line filter too. Not sure about the BC, but the Stealth and UO has surge protection.
Surge/Power Conditioning For Amplifiers
I have read alot of conflicting opinions on this subject. Is it safe to plug my amp directly into the wall? (I have dedicated circuits with hospital grade outlets) I just invested a tidy sum on a new amplifier(Pass X-150),and if I can protect it without "choking" it,I certainly would. What do the experts think???? I appreciate all opinions.