I have a constant buzz/hum coming from my speakers.  They are logitech x-530 wired through a Trust headset junction box.  I have just turned the volume on the x-530 down and while its as loud as I would ever need it, I can't hear the humming.  Any ideas?  My first thought was that its not grounded properly.
	
		
			
		
		
	
				
			
			
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