Grounding with a Earth box?

The Ground Zero uses a wire attached to a ground post or the chassis of the components. I tried it and it seemed to smooth out the highs, that's all.

@larryi 
I believe the active blocks use the negative of an RCA jack as ground, and the ground from an XLR input then they're tied to the ground block. Possibly also using the neutral.

A QUESTION?

If the neutral and the ground are tied together at this box, how does that work for noise? The ground is the garbage collector right? Am I trying to dump the noise through the ground? What stop STUFF from going backwards? I mean AC is doing the Cha, Cha, Cha, RIGHT, back and forth but always towards the source, or the ground? OR Towards the source and THEN to ground or neutral or BOTH..

This is what is messing with me. What stops it (noise) from going BACK into the circuit. In simple terms. Where is the directional gadget?

I’m thinking of running a common shielded very small flexible (antenna lead maybe), to a common star. I want to run a second lug to earth.
I’m going to bridge between the TWO. What make it go in ONE direction?

Does the ground know to suck out the noise? OR is the path of least resistance thing come into play? (MAN did I wake up foggy). :-)
So this box is a "BETTER" collector of GROUND? (as if it were a thing)
I dunno!!

Regards

What's in the box?

https://youtu.be/VN9icwiN6io