Once in awhile I get a buzzing from my rear surrounds. It stops if I turn off and on my unit. What could this be? Any suggestions?

I have similar buzzing from time to time when my digital cable box is on, due to some noise from the cable TV line. You may have some sort of similar problem, an intermittent ground loop hum. Check and see if the speaker wires are in contact with or close proximity to the 1050's power cord or some other power cord.

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Gonk

Make sure that the connecter is put on the end of the cable. If the outer shell isn't making contact it can be the cause of induced noise. Also, make sure the connection is tight in the whole cable system. This can cause alot of problems.