Musical Fidelity A5.5 hum?

[blackraven]

Here is some useful info- http://www.epanorama.net/documents/groundloop/

http://www.epanorama.net/documents/g...erhumming.html = other sources of hum besides ground loops

http://www.elo.utfsm.cl/~elo352/bibl...p%20basics.htm

http://www.chris-hofstede.nl/stories...age=ground.xml