The Bifrost is tied with the W4S uDAC as my next thing to try, after I get a new amp. I've heard the Bifrost and in comparison to my XDA-1, I think the Bifrost sounded better. Sound stage was a bit deeper and the mids had more body.
I stuck with the XDA-1 because I needed the flexibility at the time.
I stuck with the XDA-1 because I needed the flexibility at the time.