dCS Rossini vs. Berkeley Reference dac 2

I haven't spent Big Money on power conditioning. I live in a small town out in Wyoming and the power is quite clean.  But since you asked, I run an API power wedge, an older model with three isolation transformers. And I run a Shunyata Venom cord. I do plan to check out the Shunyata Denali system. For the price, it looks intriguing.

While awaiting Imgoodwithtools' answer, i will chime in by saying you've introduced many variables, focusing a systemic comparison on one component.  That said, as a ref sac 1 user, the impact of the Shunyata Hydra Triton v3 (and previously v2) is HUGE in my room- Berkeley/ Nagra/ Rockport/ Transparent.  I previously owned the complete Nordost QRT system, but the Shunyata just blows it away.  How much of that is an effect on the sac, I couldn't say.  Quieter, more transparent allowing fine detail to emerge were primary effects.  Slightly greater sense of weight at the bottom noted as well.

Dac not sac!  Autospell!

In my system, its more about isolating the components from each other. I use Shunyata Venom digital cables on both my PS Audio Perfectwave transport and my Esoteric SACD player. Shunyata Venom power cables to the Berkeley and the Ayre preamp. Then I plug the two transports into one isolation transformer since they are never used at the same time, the Berkeley into its own iso, and the preamp into its own iso. Like I said, I plan to check out the Shunyata Denali system. There is a review online at Absolute Sound, if you're curious.

Sounds good!  I too have worked with Galen Carol, who is quite knowledgeable about Shunyata products- you have a good resource at hand!  I am using a Zitron Sigma HC with my Triton- I'm not looking back or forward at this time, it's hear to stay (sorry, bad pun).  I have read the Denali reviews, surely great products.  BTW, I used a Power Wedge isolation trans.-type processor from about 1992 to about two years ago. The physics involved in these products defies both my knowledge and interest, but in my system and on my power grid, I can only regret waiting so long to let it go and move on.  Isolation transformers are great for protection, however.  I have used them in other applications.  You have some fun toys!