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Grounding Box Q

I watched a rather long video by Calvin Gabriel from Shunyata talking about his grounding boxes. Let me just say that, based on the large number of people buying these and other expensive grounding devices, I believe that they must do something positive, but here’s what I don’t understand.  If only a ground wire is plugged into the box, how can any current flow into the box?  I thought you need both positive and negative.  Or is it something like the ground wire on a turntable, where you just hook up a ground wire and it kills the hum?  
 

 

 

 

chayro
chayro OP
3,001 posts
 

I wasn’t really talking about the sound. I just don’t understand how any currents can flow into the box without both a + and - wire attached. I wonder if you attached the ground wire of your turntable to a ground box instead of the phono preamp ground it would work. 

larryi
4,073 posts
 

I don’t know how they work, but the Nordost unit I heard at a dealership had to be wired to an unused input.  I told the manufacturer’s representative that my amp had only one input, but I could wire it to the chassis ground.  He told me that would not work, it had to be wired to an input; I took this to mean that the hot side was also in the circuit.

ozzy's avatar
ozzy
7,505 posts
 

Some of these units are designed to be used as chassis ground and some are signal ground. Typically, the chassis ground units are also connected to the wall AC ground, sorta like a "Star" ground. Strange as it may seem it does make a difference.

ozzy

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