I own a grounded grid. At the moment, I'm going direct from CD to amp, so I'm not using it. I can repeat what I've said on other forums--it clearly outperformed my ARC LS15, which cost 3 times as much used. It is DEAD quiet (especially when not in the system :) It won't noticeably add or detract anything to or from the sound, and I was running it through Merlin Milleniums, a very 'revealing' speaker. It is a very bare-bones preamp, though. In it's 'stock' form, no remote, etc. If you're interested, look up the Soundstage review--the guy compares it very favorably to a Joule ELectra. Of course, the Joule is 'better', but the GG matches up very well, given the price differential.
