markl,
I want to add my thanks for all of YOU that went into your review of all of those power cables - the rig-twiddling, the buying and swapping, the burn-in periods, the critical listening and the writing. Piggy-backing on your work, I added two Black Sand Violet Z1's to my main rig for a surprisingly large (and really cost-effective) improvement in overall sound quality / listening experience enhancement. Given the point to which I had my audio path prior to the Z1's, nearly any improvement I was going to make would mean pulling a piece of the path out, and replacing it with something else. It surely pinches a whole lot less when the items being pulled out cost $7 apiece instead of hundreds of $$. And, I've read the reviews of folks who've spent the same amount of money that I spent for the Z1's to upgrade their CD player, or DAC or IC's from where I am - and, generally, they speak of the result as "the last few percent" order of magnitude. For the same amount of money, the changes I've experienced are "take the sound to the next level or two" order of magnitude. That I didn't have to search for years to find the Violet Z1's - that you just plopped the credible reference into my lap, so to speak, is simply incredible. So, along with the others, "Thank You, Thank You, Thank You."