Ground 'box' what's in them?

Perhaps the first of the Ground Enhancers was the Acoustic Revive RGC-24. A wire from one of you components goes to a metal cyninder that contains Tourmaline and "other" minerals.Especially when attached to an unused RCA input of a preamp, there is a significant effect. High frequencies are diminished with the effect being a blacker background and better imaging.

The Synergistic Research Grounding Block is somewhat different in that the Grounding Block also plugs into the ground of a wall socket. Unlike the Acoustic Revive product multiple components plug into the Grounding Block. The effect on sound seems to envolve more frequencies than the Acoustic Revive unit.

I have tried both products in my horn speaker system and in my dedicated headphone system. Both systems due affect a significant change to the system's sound.

I think both are worthy of trying.
I have not tried the Entrigg System. It is very much more expensive but has a myriad of options. There is a thread about this product at the Whats the best Audio Forum that runs for 16 + pages.

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.

To Electroid: Since you use a system with the grounds lifted, I hope you will try The Synergistic research Grounding Block as it has a money back policy.

You are the perfect person to do this experiment with one of these ground conditioning devices