OK, so my VD Sig Cryo power cables now have roughly 50 hrs burn-in and I've logged considerable listening time on them. Here are my conclusions:
I had been *hoping* that the level of improvement wrought by the Sig Cryos over the Power 3's would equal the jump from stock cable to Power 3's which was a dramatic night-and-day sort of difference. That may not have been a fair expectation, and I acknowledge there are numerous factors that will dictate the performance of a given cable in a given system.
I fully recognize that these $1K+ list price cables are more than total overkill for my modified Sony SCD-333ES source and Melos Maestro amp. The SCD-333ES with Modwright mods represents an investment of $1200 plus about $600 for the mods (although I think my modified player competes with much more expensive CDPs) while the Melos Maestro retailed for around $2500 all tweaked out plus some very expensive Siemens NOS tubes. I would imagine that the Sig Cryos are meant for components in the $5K range and above.
Overall, I would say that the boost in performance provided by the Sig Cryo cables over the Power 3 *in my unworthy system* was about 50% of the major leap in performance I got from going from the stock cables to the Power 3's. That said, given the sweet deal I got on the demo Sig Cryos I'm still delighted by their performance vs. cost. This was a great tweak over the mighty Power 3's and well worth my money. Plus, as I upgrade, I can take these killer power cords with me!
Anyway, there are several potential conclusions I *could* draw from my experience:
1. The VD power cords price/performance curve peaks at about the Audition/Power 1 level. This would be jumping to conclusions, IMO, but can't be ruled out.
2. Given the general level of components we use on this site, the Audtion/Power 1 cords are about the apex of what Head-Fi'ers should invest in. Let's face it, most of us do not have have $5K and above components. A $1K power cord does not make much sense for us.
3. My VD power cords are plugged into my Monster HTS1100 power conditioner. Good as this little $200 power conditioner is, could it be limiting the performance of the Sig Cryos in my system? Again, Rick at VD reco'ed I insert his cables straight into the wall. However, I want surge protection, so I decided to put them in the Monster despite his advice.
Let me just re-state for the record, I'm floored by the performance of the Sig Cryos in my system. I've reco-ed the VD cables to everyone I know who is seriously into audio. I highly recomend these cables to you. However, please see my original caveats about power cords that I posted earlier in this thread to determine if a power cord upgrade is really rational at all for your system, or whether that cash is better socked away to pay for a better source or amp.
Rock on!
markl