Will line conditioner do anything for the other receptacle in a duplex?


Would it provide the same purported benefit as the Venom Defender, Furutech NCF Clear Line or Magnetic Wave Guide products?
tcutter
I have multiple in my panel, step down transformer, conditioner, phono stage, amp, speakers, crossovers, several drivers, and super tweeters. 
If a modular device (e.g., Venom Defender) and a whole house device (e.g., EP-2050) can "clean" the adjacent circuits, how is a power conditioner different?
@millercarbon could you recommend a brand. I would like to try one, starting with just one receptacle. Thanks!
I'm going to recommend what I just bought: Dave Elledge's P.I. Audio UberBuss.

Best conditioner around. And fair price as well.
Clearly I really need to stack my Bright Star Little Rock on top of my Puritan PSM 156.