Received it today, and I was rather excited as I tore open the box. This is my largest audio purchase to date. I currently have it playing as I type. I have it hooked to my MacBook Air through USB cable. The Gungnir is hooked to the NAD integrated amp through Blue Jean Cables RCA interconnects. I have my HD600 plugged in to the headphone jack of the NAD amp.
The unit is just beautiful to look at. Clean, modern, and attractive in brushed aluminum. Heavier than I expected, but it has a good place to rest on my desk.
The resolution is pretty good. I am hearing things that I have never noticed before. I'm finding that all the music I'm listening to has slowed down. Where before the music would just flow through without much notice, I can now analyze each note and fine detail as it passes. I'm also hearing more background noise which is likely from the not so good recordings.
The sounds of piano and cello are more realistic. I hear the weight of the key strokes and also the twang of the strings. Further, its nice to hear the notes strike and hear it decay over time.
I find that everything in the music is separated quite nicely. There are layers of music that opened up to my ears. This makes it feel like one is within the music and can pick and choose what to focus upon. Never heard anything as good as this before. I feel like I am almost there with some of the music. Quite enjoyable.
Turning the volume up doesn't break up the music and make it sound harsh like it did with my previous Creative X-Fi HD Soundcard. I usually don't turn up the volume too loud, but it's nice to hear the music not lose quality as the volume increases.
The sound is not quite smooth yet. It sounds slightly lean, and there may be an edge to the notes. I would say the Gungnir is very neutral to my ears. It just presents more of the music than I have heard before.
For those that recommended it over the BiFrost, Maxvla and Paradoxper, thanks! It was a hard hit to the wallet, but I think it takes me closer to music nirvana, much much closer i would say. I can't put my headphones down. :)