Did anyone experience Audio Prism's Ground Control

Bud, On AA there is a thread that states to further improve on the Ground Control idea attach a wire from the negative side of the Amp to a 9 Volt battery negative side only.
Claims are to greatly increase dynamics and increase all the good stuff that the Ground Control does.

Huh???

I've got to try this later today...

Ozzy, don't do it if your amp is a SS amplifier. All SS amps have a connection to ground and, just like placing too many GC's on a solid state preamp, I am pretty sure this next hot idea is just going to turn one or both channels off. Won't hurt the SS equipment and should clear within a half hour of removal, but I would expect problems for 100% of SS gear.

Bud

Well I just tried it . I used some of the Radio Shacks 9V battery clips and soldered them to a RCA. Plugged the RCA into one of the unused RCA inputs on my Amp (I am using the Balanced inputs). First, I tried it with just one RCA and then with 2.

Resultd so far , not as dramatic as I hoped but perhaps more detail and dynamics.
But then I added another one of these to my Dac along side a Ground Control, it seems the soundstage and detail increased.

Have'nt tried it on my speakers yet So, I will experiment further.

Thanks for the advise Ozzy. I just ordered a pair.
Did you go with the cryoed or non-cryod?

I was getting close to trying out the Walkers, but
then I came across a great deal on the new Stillpoint
Ultra SS footers. I hear they are a significant upgrade
to the regular stillpoints with risers and inverse risers
which I have. Like the AP GC's the stillpoints are another
one of those rare tweaks that improve sound staging and detail
while paradoxically sweetening the highs with better timbre.
The Purest Audio Design digital filter is another that I am
now playing around with.

So, the price of the Detail Magnifiers is ideal for my Gallo
Nucleus HT speakers. For my DeVore Super 8's I will have to
wait and see if the Walkers reference HDL are that much better.