Ground 'box' what's in them?

Ozzy:

You are absolutely right that the Entreq system is expensive and with so many possible units and connecting wire combinations one could go crazzy trying to get the perfect sound.

The Entreq thread at Whats the Best Audio forum is hundreds of posts.

I have the Synergistic Research Grounding Block and at $599.00 it is not a major budget breaker.

With their friendly 30 day trial, I looked at it as an opportunity to learn how my system's sound could change.

I found it a worthwile addition to my system.

The Entreq boxes are effective tweaks- they have a beneficial effect, noticeable but subtle. If they cost less than a major component upgrade, I would say they are worth it.

I wouldn't name the product.
A well known friend open up 1 of the well known product & discovered that it consist of a brass plate covered with some kind of sand . I have it & it works fairly well with some equipment . I have a friend who DIY with many brass plates & it works in his syst !!!
Another expensive ground box I have seen a photo of it . 2 rods with brass rod through it & connected with 2 wires !!! & non of the connecting rods is isolated !!! Funny thing is that I have personally heard of demo with this product & it's eye popping - seriously effective . I m so tempted that I wanted to buy it . However couldn't agree with the price .
Another product u can try is from Telos Taiwan which came out with an electrical ground box where every terminal is rated zero ground potential . I have heard it . Fairly effectively

Correction - I meant none of the connecting post is isolated from each other

All very confusing. Jea48, you obviously know what you are talking about, I just wish that I did, and how it relates to these boxes.