Tuneslover
Headphoneus Supremus
bifrost has the better USB, and I've never heard weird glitchy artifacts in it from its USB. modi multibit, I had initially had that issue, so I got the Eitr to fix it.
modi, I've also had the occasional "ringing" issue where the sound in one channel gets weird, and the only solution is to power cycle it. Not sure if that's fixed in the firmware upgrade that been discussed here, or which version of the firmware I actually have for that.
Other than those issues, I can't tell them apart in A/B. The Bifrost is heavier, stacks better with my Asgard 2, and doesn't move around on the table as easily.
The other claim to fame with the Bifrost is that it can be upgraded. While this is true, I found the cost too prohibitive to upgrade my Bifrost 4490 considering currency exchange and shipping costs. Instead I simply sold my Bifrost 4490 and purchased a Modi Multibt.
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