Did anyone experience Audio Prism's Ground Control

Well, I know you had quite a few in the system, so it is quite possible you had too many. I would let the system play for a number of hours to completely discharge and then try just one location in addition to the speakers again.

You could just as easily be hearing change as a better thing, for more of them or less of them. Very easy to get caught in that loop.

My system hasn't changed notably for quite a while. I do periodically unplug and replug all connections though, so it is entirely possible that is enough interruption and you do actually need a short system down time. We all are exploring this territory, no actual rules other than no more than two per individual component and none hooked to a digital SPDIF RCA plug, or any other unbuffered digital ground connection, ever.

Bud

If you have a Great high resolution system you should not need them.

That's correct. However, no one has what Ground Control provides, any more. We used to, back when we had poured ground planes underneath our point to point circuitry. But, those were not high resolution systems, nor low distortion systems. They just had this wonderful "ease" and naturalness, due to the completeness of their back wave.

Nowadays, you must have a fully differential high resolution system, to get that natural characteristic. Otherwise, the strip ground PCB format we are forced to, due to the enormous increase in air borne EMF, forces a low resolution to the signal pulled back through the various loads in our audio systems. This Ground Control item is just there to support retention of this back half of every wave form information that is otherwise lost to noise. And since this loss mechanism is true at almost all levels of audio equipment, Ground Control is just about your only help.

You can try it out on the cheap too. Take a 2 foot length of zip cord, split it into two pieces. Then strip about 2 inches of plastic from both of the ends of each piece. Make a loop and twist one end of each individual piece to the other end of that same piece, making two separate shorted loops of wire. You can flatten the loop out if you like.

Then attach the twisted ends of one loop to one speaker, ground / return or black lug connection point. Then do the same on the other side.

If you notice any change, across about a three hour time span, then your system will respond very well to the much more carefully tuned Ground Controls. Don't expect these loops to provide the holy grail, they have about a 90% chance of changing the sound quality. Could be better, could be worse. The Ground Controls are designed to be better.

Bud

Bud, Replugged one of the RCA Ground Controls into my CD/Dac after being unplugged for 24 hours. The sound is back at where it was that originally impressed me.

Based on this I will periodically unplug the RCA Ground Controls, perhaps about once a month.

Thanks Ozzie. One more piece of the puzzle in place.

Bud