Did anyone experience Audio Prism's Ground Control

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

Budp, So would you recomend plugging the RCA Ground Control into my Pass Labs Preamp or my Cary 306 Pro CD player?

Try both Ozzie. It takes about two hours for all of various charge states to get organized. After that time interval, pull the RCA out, listen for 10 minutes and plug it back in. Do thi for both, though you may want to check with Pass Labs to see if their ground design is continuous for both channels. If so, one RCA should do and I would place it on outputs in preference to inputs, but I doubt there is a rational reason behind this choice. Good idea to check out the Cary also, but I would expect it to be a continuous ground for both channels in the analog output buffer stage.

Under no circumstances should you introduce one of these Ground Controls to the digital ground of any digital section of any piece of equipment. Using it on the outputs for the Cary is all you want to consider and only for the analog outputs that drive the preamp.

Bud