For what its worth, the CD player I substituted out for the Squeezebox was not grounded (i.e., it had 2 pin power cord) but it did not give me a hum problem when used with the Nait.
-- Ned Ludd ------------------------------------------------------------------------ Ned Ludd's Profile: http://forums.slimdevices.com/member.php?userid=11562 View this thread: http://forums.slimdevices.com/showthread.php?t=33414 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles