My Schiit Bifrost 2/64 arrived, and I rearranged my source chain some.
Before, I was running Topping DX7Pro>Little Bear Selector Box>Emotiva Active Speakers, or DX7Pro>Little Bear Selector Box>Audio-GD NFB-28>Headphones
Since the Bifrost doesn't have volume control, I need to run everything through the NFB-28. So I've gotten rid of the Little Bear in my chain. And I've upgraded my interconnect to a shorter, thicker gauge set of XLRs.
Current chain looks like this: Bifrost>NFB-28>Speakers || Headphones.
I tell you all this to emphasize more has changed than merely the DAC.
That said, things have DEFINITELY warmed up, and in a good way. The HE1000 Stealth sounded amazing before. Of all the music I listened to, only The White Stripes sounded a little fatiguing in the treble region. Whereas The Beatles, Pink Floyd, classical, and other audiophile recordings, all sounded heavenly.
There wasn't much improvement needed. Yet improvement I received. The new chain, with the Bifrost at the heart, is warmer still, with less shrill treble, even on The White Stripes. I listened to them extensively, and never grew fatigued. There is also noticeably more weight and body to the sound. Things come across more tangible and present.
The last piece to this full-system upgrade will be the Violectric V281 Reissue, which still hasn't shipped yet. That is a warm sounding amp in its own right, but I don't expect it to be much warmer than the Audio-GD. Though I am expecting significant improvements in other aspects.