Did anyone experience Audio Prism's Ground Control

Amazingly! the two devices are compatible and reinforce each other in terms of blackness and separation

Hole in one Anti. The two were deliberately designed to work together to uncover and retain the information your system was already capable of providing. Eventually do please try the RCA versions on preamp , DAC or stand alone CD player. Especially an inexpensive stand alone CD player.

Now you know for certain that you did not waste your money on your gear!

Bud

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

Bud, How about if I try it at the Speaker end?

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.