Well today I received my SVS 20-39 CS and Samson S700 combo packaged nice and safely. (Though it was missing one of the front rack mount "L" brackets in the box.) When I set it up all of the speakers plugged into the Denon 3802 began humming like a swarm of bees. Simply removing the RCA connector from the Sub Preout eliminated the hum, but meant the sub wasn't connected at all. However, thanks to some of the 1000 posts that came up in my searches I learned of the "Cheater Plug" theory. It seems that no matter how much money I have invested in my system, it will not work without the Home Depot 3 prong to 2 prong adapter.(SKU 07847752) I'm pleased to say that this 50 cent item has saved yet another HT from the Samson amp hum issue. Thanks for the search engine and the previous responses.