Stream of thought: Received the amp yesterday but connected to the Bifrost 2 via single ended cables. Can't seem to find my XLR cables but should be receiving them from Amazon later today or tomorrow. From memory, I'm really liking what this amp sounds like compared to the OG Jotunheim. The Jot 1 early model was too incisive and this amp doesn't sound as bright. Another positive is that I don't feel a wall of sound hitting me so it has a tad bit more depth. I'd say it's something like moving from the HD650 to the Focal Elex. Not big but noticeable. Sounds great with the Verum One when the left side isn't cutting out and I really like the synergy of the Aurorus Borealis with Jot 2 compared to the SW51+. Both play off each others strengths. Found the Borealis with the SW51+ too rolled off and warm even with the default tubes. I'm planning on bringing in the SW51+ to my work room for a comparison with the SW51+ once the balanced cables are in.