Did anyone experience Audio Prism's Ground Control

Well, that is quite interesting. The one reported failure, with a fully differential system, comes from Stuart Yaniger whose system is detailed here http://syclotron.com/ Stuart is a friend and a died in the wool objectivist, along with being a talented designer and builder and his system showed no changes he could detect.

I cannot personally make any claims as my personal system is all non differential, just report what I have had others tell me. So, thank you for that insight Jejaudio, another data point and a useful one too.

Bud

Now that I have installed the second set of Ground Controls on my biwire speakers (Andra 2), I cant believe how clear and defined the bass has become!
This product should be standard with all speakers!
How can I invest ?

I'm using a pair on my my tube driven Sound Lab A-1(PX)as well as my Duntech Sovereigns. Improvements are cleary audible as a lower noise floor for both systems, and for reasons I can't fathom, improved soundstaging on the Duntechs.In the world of tweaks, this is a good one for the price.

Hjs, Did you find much improvement with the RCA version?

Just to stick my two cents in. The RCA pieces seemed to make the biggest difference in ordinary commercial CD players, sub $500 products. Rendering the typical high frequency hash and garble, however slight, back into the musical information it actually is, before the op amps have their way with it. Then I got hold of this solid state Nikko preamp and now the biggest difference made is with the Nikko.

Our Asian markets seem to be much more interested in the RCA than the lugged speaker / amplifier Ground Control and the change in the Nikko's behavior may be a clue as to why this is true. In the other cases I have tried the change was subtle, being primarily in making three dimensional interpretation of the stereo illusion much easier and removing even more of the noise masking, small, wide band wide frequency response information difficult to interpret. This seems to be more of an ease in spaciousness than anything else.

Bud