Kim, welcome. Glad to hear that you're enjoying your Axioms. One point about the sub hum is puzzling: you said that you disconnected the cable TV line(the most common cause of hum in AV setups)but the hum was still there. Then you said that connecting the "TV inputs" caused the hum to start. If you mean that the TV connection itself(without the cable feed)started the hum, then this isn't what the Axiom isolator is designed to correct; it's specifically for a loop running through the cable connection.
