Hi CurtisV,

You may have a "ground loop," which can usually be cured by reversing the prongs on the AC plug (if you can) of ONE component. (By "reversing", I mean unplug the AC line, turn the plug around, and plug it in again.) Try reversing the two prongs of the plug for your CD player first and see if the hum disappears. Or reverse the AC plug of the NAD (don't do the CD player if you do that).

Regards,

Alan Lofft,
Axiom Resident Expert (Retired)