Just wondering what your guyses setup is for this and how important you feel it is? I persoanlly don't think it has much of a difference if any. Maybe if your power is realllly bad it could help. I think the most important factor is the quality of the transformer in your Amp/Dac/Pre is 100x more important. Of yours has a bad one then maybe it could make a bigger difference That being said, I have a direct AC line and I am using a hospital grade trip lite noise suppressor and isolator.