Wig and Bacardi,
What I am noticing with the HD Power 3 power cords is the total naturalness of the sound stage. In my system there is a continuity to the sound stage that was unobtainable with even the top Synergistic Research power cords that I have had in my system that were a heck of a lot more expensive than the Power 3. The imaging is precise and not in your face at all with the Power 3, a bit laid back (but not unnaturally so) as though you were at a performance.
I am listening to a lot of excellent CD remasters lately. I have been collecting the best quality recordings that I can find -- everything from solo lute and piano to chamber music to concertos to symphonic music. What I am hearing with the Power 3 cords in my system (I am fully loomed) is what I would term "performance-grade" -- like being there. These cables are uncanny in what they do. I have not exaggerated anything in my descriptions over the months here. Others have come back to the forums and verified that my descriptions of the Power 3 and other HiDiamond cables are very accurate.