DIY Active Ground Box

@fatdaddy2 

Cutting the cables would achieve the exact same thing as not cutting them...except that by not cutting them, I have an opportunity to do something with them. Also, by cutting them, one has no way to address any noise issue having a bare wire exposed.

I understand people's skepticism about stuff like this, but if I break it down to the most basic electronics concept, then it makes sense.

There is a positive conductor and a negative conductor and a braided shield. Normally, the shield just loops into itself inside the cable. Whatever signals it captures or picks up, just stays netted in the shield. By having an external conductor for the shield, then any signals it picks up can now be bled off and away.  I don't see the harm in having it direct somewhere else safely.

Point is, it won't hurt to try it.

FINAL UPDATE:

I did it and it works. 

For about $87.00 USD I bought all the materials and put it together.

A small 6 x 6 inch wooden box.
A package of two 6 x 6 copper plates
A coil of bare copper wire.
A package of four banana plug binding posts.
A male, all copper, NEMA 5-15 amp male plug.
A coil of shielded, tinned-copper wire.
A coil of copper tape.
A pack of four banana plugs.
A package of Hawaiian Charcoal Salt.

Things added that I didn't buy: Tree charcoal, and large crystal rock salt for use in making ice cream.

I plated the bottom and all four side walls of the box in copper plates. I used a "U" shaped copper plate and attached it to the main banana biding post. Then attached a line of bare copper to that same binding post and attached it to the bottom copper plate. The lid is where I attached the remaining banana plug biding posts.  Each lid post has a line of bare copper wire that is attached to the bottom copper plate. I then wrapped some copper tape around all three lid binding posts. I filled the box with a mixture of tree charcoal, Hawaiian charcoal salt, rock salt, copper filings, and some local dirt.

Then I made a ground plug using the shielded tinned-copper wire to attach to the ground spike on the NEMA plug. I taped off the positive/negative posts inside with electric tape. On the other end, I added a banana plug.

I used a voltmeter and tested to make sure each post conducted all the way to the ground cable.

Finally, I connected the three ground spades and then plugged the ground cable to the wall socket.

I also tested with the voltmeter to determine it was working and was conducting signal. Everything worked.

As for sound quality, I am going to let it break in for a week or so before I determine if it alters the sound in anyway.

I believe you don't need a box if you are connecting the signal grounds to an outlet ground.

If you are using a box by itself to dissipate EMI then make an antenna in a V shape inside the box with a simple banana plug. I fill my boxes with quartz crystals, Rochelle salts, and tourmaline. I use wooden boxes and also have purchased some cylindrical cardboard tubes for the passive devices.

So I use both methods and for the outlet I made a one wire plug for the ground only and a banana jack sticking out the back to make connections from the signal grounds to the plug.

I also use the Ground Master for power grounds onto the Puritan and separate ground rod. I may make a parallel run with another groundmaster for the signal grounds.

I wanted a way to ground the loop spades the cable have. Just letting them sit there dangling, or taping them off or cutting them off was undesirable.

I have enough material to make another one.  I think I will try your backfill recipe. :)

Why copper plating?

Why not Faraday fabric that actually blocks EMI?