My wall outlets and the outlets in my Audio Excellence Power Wing II are the same -- Oyaide R-1. So, any differences I hear when plugging the conrad-johnson CA200 integrated into them should be the effect of the power line conditioner.
I prefer the sound with the Power Wing II: blacker background, more low level detail, and a wider/deeper sound stage. Of course this is going to be system dependent but that's what I've found to be the case for mine.
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