I haven't used the VenHaus Hot Box, but I have cryoed VenHaus Flavor 2 PCs on my Stratos and Tempest. I also have a cryoed VenHaus Flavor 1 on my Jolida Jd-100 cdp.
I run my Stratos straight out of the wall from an outlet purchases from VenHaus. The other components are run out of a Monster Cable bar. The Stratos seems to love the wall outlet. The other components are running nice and clear out of the bar.
I will say my components run cleaner, with better separation, soundstage, detail, and esp. low end, when using the VenHaus cords. One of the biggest improvements came when I used the Flavor 1 on the Jolida - the bottom end became amazing, and the rest of the spectra improved, too.
I also note I replaced a Groneberg cord on the Stratos, and haven't looked back. In my opinion, with my setup and components, the VenHaus cord clearly outperformed the Groneberg.
If anyone is using a cryoed Flavor 4 on a Stratos, please post your opinions.
