Originally Posted by hangman
The M series are essentially rack mounted power strips. they provide no real filtering (regardless of what furmans advertisements might suggest)
so, since the Mseries aren't actually filtering anything, you won't Double your filtering.
haven't really opened a PM series furman. so I can't comment on those.
I mean, I know they aren't as good as higher end stuff, but reading the specs leads one to believe that there is some degree of RFI and EMI filtering going on...