Grounding with a Earth box?

These guys, probably just a guy with phenomenal sense of humor, are running to win the prize of some sort. And they/he may make some money along the way.

All grounding schemes from component to earth have different levels of impedance (ground potential). We know this much.
By no means am I an expert, but by wiring each component’s chassis (earth ground) to the grounding box and adjusting the settings, the theory is that an equal impedance to ground can be achieved.

https://www.synergisticresearch.com/isolation/ground-isolation/grounding-block/

http://www.graniteaudio.com/zero/index.html

Where’s millercarbon when you need him?

I believe it's a way to simulate star-grounding after the fact.

"Where’s millercarbon when you need him?"

In the room next door. He is finishing in room 4 and will be with you in a moment.

I think the alternative to such boxes is having a solid rod planted deep in the ground outside of your house with a ground wire running to a single grounding point for all of your gear.  Why this is important, I don't know.  But, I do know it does affect how a system sounds.

I heard a demonstration of the Nordost grounding system.  It consisted of such a box to which all components are connected via a run of wire from an unused input to the grounding box.  Nordost supplied wires with all sorts of alternative connector plugs to fit that unused input (RCA, XLR, BNC, etc.).  With the grounding installed, the biggest change in sound was to the imaging of the system -instruments and vocalist seemed to float more freely in space and seemed to be actually present in the room.  The decay of notes also seemed to be more obvious and natural sounding instead of sounding cut off.  I liked what I heard. 

I did not get to hear it in my own system and did not ask for an in-home demonstration because my amplifier does not have an unused input.  I was told that a chassis grounding point was NOT an alternative to an unused input for this grounding scheme.