Hi, I'm new to the forum. I found this forum in mid-March and have loved reading about the measurements and all of the equipment. I owned at the time a first generation Yggdrasil which I have had since late summer, 2015 and have enjoyed. I particularly enjoyed reading about the Topping DAC Dx7s. I had decided to upgrade the Yggdrasil to the gen 2 with the USB upgrade as well and ordered this from the Schiit company. Unfortunately, I am still waiting in the queue. In the meantime, I purchased the Dx7s and received it within one week, replacing the Yggdrasil in my system.
I read all of the measurements made by Amir and came to a pretty good understanding of what they meant, but I noticed there isn't a lot of comment on the listening differences between DAC's especially these two. So I have spent the past two months with the Topping. Very good sound, detailed, but with a bit of noise at first which seemed to subside over time. I played with the filters and settled in on setting 2 which was best to my ears.
This past weekend, not anticipating I would have to wait in the queue this long, I replaced the Topping with my Yggdrasil. No warmup, just cold back in my system. It is still version 1. Without a doubt, right from the start, the Yggdrasil sounds significantly better. More detailed, less noise, more bass umph and a smoother midrange/treble. That is to my ears.
I would love it if along with your analysis, you would provide your impressions of what sound differences these DAC's make in your system. That would help to guide all of us who are looking to upgrade and purchase some of these DAC's. I am not a troll from Schiit and have no attachment to them other than I own their Yggdrasil (if anything, a little frustrated it is taking this long to upgrade). I purchased the Topping and am certainly not upset that I tried it as it was affordable, but despite the high measurements comparatively speaking, in my system, the Yggdrasil simply sounds better.