Harley plugging a strip into the Quintet is a waste of a Quintet outlet, as I have found. I suspect more audio gear has EMI/RFI protection than we realize, it just isn't something they put in the feature list. One of my pieces mentioned having it in the owner manual, I can't remember now if it was the Pass amp or 512, I'm wanting to say the Pass. If so, the upgrade power cord from Clarus still helped raise the sound quality.