It's been two months since I began using the ATH-AD2000.
Three weeks ago I acquired the Lehmann Audio Black Cube Linear amp.
(
http://www4.head-fi.org/forums/showthread.php?t=119022)
This amp paired with the AD2000 has provided an excellent listening experience.
The sound is so good I'm becoming dissatisfied with my portable rig, iPod -> SM3 -> UM2.
The AD2000 should be well burned-in by now, and the Lehmann has had extensive burn-in time.
Source is an E-MU 1212m playing Apple Lossless files.
All iTunes sound preferences are unchecked.
It seems not many members have the AD2000 or the Lehmann amp.
I'll try to describe what I'm hearing with some specific pieces of music.
Jazz Variants by O-zone Percussion Group, Track 15 on Manger Musik wie von einem anderen Stern:
Soundstage is very clearly defined. It sounds as if you are standing at the conductor's spot and facing the performers. Each instrument can be picked out easily. They sound very realistic, like a live performance. The drums don't have the same impact as speakers, but the treble instruments (xylophone?) sound better than they would live.
Grandma's Hands by Livingston Taylor, Track 12 on Manger Musik wie von einem anderen Stern:
It sounds as if the singer is standing right in front of you, and the backup singers are standing behind him, two slightly to the left and one to the right. It seems the leftmost backup singer is snapping his fingers; the snaps seem to come from several inches beyond your left ear.
Psycho Killer by Talking Heads, Track 1 on Stop Making Sense:
The audience cheering at the beginning sounds realistic. The cheers extend outward and there is a sense of distance. The bass is powerful and deep without being muddy. The singer's voice stays very clear above the background bass.
Children (Dream Version) by Robert Miles, Track 1 on Dreamland:
In the first 40 seconds, there is a greater three dimensional quality to the sound effects than I've heard before. The sound of birds chirping over the rain/water-like sound is clear. Electronica music sounds especially smooth and pleasing with the AD2000 and Lehmann amp combination.
Magic Words by Coco Lee, Track 13 on Exposed:
I don't think I've ever heard Coco Lee's voice sound so good. On some tracks her voice seems to have a more playful quality, as if she's smiling at you while singing.