@ Davea33, Hi, If you use 6-ft or less dedicated earth grounds out side the house to each recepticle there is no need for a conditioner, of course dealers and conditioner companys will diagree!, they want your money!, conditioners are good if you cannot run this scheme!, It is difficult to manage to arrange for these dedicated grounds, thus, the use of conditioners are used more!, most audiophiles do not have dedicated grounding schemes that I have exsposed here, they commonly share a single ground, so yes, a line conditioner will help that set-up, I have done all of these listed here thru out the years, what I have listed that works best was revolutionary and cost effective to the sound!, Happy listening.