Maxgain: Of course, the true valid comparision would be to A/B two of the identical, brand new outlets, one cryo'ed and the other not, but this is unlikely to occur in many systems. While I don't take your enthusiasm or results lightly, even if I were to install one of these myself and had the same reaction you do, I would still wonder whether what I thought I heard could be due, at least in part, either to the mere fact that the outlet was new and newly installed (presumably any better quality new outlet might possess an advantage over an older - and therefore more oxidized - lesser quality outlet, and the installation process would probably expose freshly-bared wire ends for the in-wall connection), and/or the psychological expectation level inherent in the doing of all the work, combined with the unavoidable time delay involved. Still, I acknowledge that if, in the end, the listener is convinced something sounds better and they've gotten their money's worth, then it doesn't really matter about trying to test the change in some relatively objective way in order to help verify and quantify the difference (unless, that is, you are a listener like me, who is more comfortable psychologically in the long run if I can figure out a way to "prove" things to myself before declaring myself satisfied with what I've done). Nevertheless, I remain interested in knowing whether anybody actually has performed a real-time, side-by-side comparo between two otherwise identical outlets installed at the time, one cryo'ed and one not (or an equivalently rigorous test involving any catagory of cryo'ed part).