I know I’m resurrecting an old thread but thought I’d chime in as there’s not a ton of info out there on the F360 Preamp.
I’ve had mine now for several months (got in just weeks before the price increase to $2500). Short version is that, in my opinion, it’s outstanding.
To be truthful, I originally wanted the Foz SS-X but ended up having a nice chat with Black Ice and they convinced me to try the F360. Glad they did. Their preamp is the single best upgrade I’ve made with the exception of my Klipsch Forte III. Just a beautiful, crisp and smooth pre with a wonderful stage. Ironically, I really don’t use the SSX function much at all. The amp just improved my overall enjoyment by a significant margin.
If anyone is interested in more specifics, please let me know.