While the AS-2 sounds terrific just out of my Galaxy S3, it scales (up) impeccably well with my (dedicated) portable & desktop gear.. particularly the Violectric stack 9V800/V200).
JHAudio has my in-ear impressions, so I'll be getting a JH13pro in a month or so.. of course, AS-2 impressions/comparisons will follow.
Gonna link some comparisons here?
I found that my ASG-1 out of my dedicated desktop gear to be such an improvement over my iPhone 4S that I don't even bother taking it on the go with me anymore and I don't really have any interest in a portable rig.
Do you think it's the dynamic driver getting most of the benefit?