So which magic cable company is selling AC cables that you can unscrew the Read it all, the info is right on. 3rd prong, to eliminate noise? Brilliant, as I've said many times, Audio, make up stuff, people accept it. read this, the life you save may be your own. http://www.prosoundweb.com/studyhall/sr/whitlock/grounding.php
I don't know why I'm bothering to respond to this because you won't change my mind and I certainly won't change yours but as long as one component in the system is grounded THEY ARE ALL grounded because both RCA and XLR connectors have a ground connection. But another way of making sure that you only have one ground for the lowest noise possible in a system without lifting grounds is to connect everything to ONE power conditioner. That's what I do.