In the last couple weeks I helped a friend choose a new streamer / DAC. He had a Yggy and my Aurrender N100 for comparison.
We were auditioning a Linn Selekt with only the Streamer / and the mid level DAC (total $12K. ~$4K streamer and $6K DAC). I was able to compare the two streamer / DAC combos. The Linn was much better. The treble on the Yggy was mostly high frequency hash, the sax was a lean characterization, the bass line was a single boom. With the Linn the cymbals were brass sounding… no distortion, the sax rich and finely detailed at the edges, the bass line resolved into three notes. Big difference! Then we compared the Linn streamer and the Aurender streamer through the Yggy. Wow. Most of the difference was the Yggy. The Yggy was by far the weak point.
The Aurrender N100 is a very good streamer for the money although a generation old… it held up to the new Linn well. But the Yggdrasil was simply the weak link.
I would recommend upgrading the Yggdrasil first… get a better DAC, then upgrade your streamer… I recommend the best Aurrender you can afford.