I have the Corda HA-1 with the Absolute Power Cord. I haven't tried it with anything else, but it is only $50, only a bit more than a standard cord you could get at Radio Shack or a computer store, IMO it's worth it to just start with the APC. What it does not have that others have is shielding. But if an 8' well-built, well-reviewed cord is what you want, go for it.
I did see dcg at the Philly show this week. He brought a b-stock Virtual Dynamics Power 3 AC cord with him, which he got for a very cheap price from the mfr., who apparently didn't like a batch, perhaps for a cosmetic reason (I can't remember exactly what dcg said about why it was b-stock). He said it sounded great. I don't recall that he a/b'd these two cords, though.
The thing was thicker than my garden hose, and weighed twice what the Corda weighs. Betcha most of the weight was in shielding (or the water left in the hose when they built it).
Anyway, I think you're best off to put your extra money on interconnects for the HA-1, where they'll probably pay you back better. The Outlaw PCA cables are wonderful, and prevent any RF (with lesser cords, the HA-1 can pick up RF or show some noise at low levels). With the Outlaws, my Corda is silent at all levels when there's no input signal from a source. I meant totally, absolutely, positively silent, for the full rotation of the volume control.
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