Anyone has any review on this unit? I just purchased one 3 days ago, and im amazed with the sound, EXCEPT for this fast heart beat like sound in the background that is always there, specially when volum is low, except when using the radio. The place where i bought it are really nice and ready to take it back. They even called there suplier, and they said it is "normal" its a probleme they are aware of, they have "fixed" it as it was worst. I will bring it back because this sound is very anoying, but i am pertty sad because other then that, its my dream theater in a box! Anyone heard anything about this? Thanks in advance.