Quote:
Originally Posted by
codeninja 
Any experience on comparison between USB powered DAC vs AC powered?
That question depends on the source as much as the DAC. I've got 3 different USB sound cards (NuForce Icon Mobile, MAudio Transit, and Sound Blaster 96/24), and 4 different computers. With my netbook and desktop all USB sound cards have a dead silent background and are as good as AC. With my Mac Mini and my gaming laptop, there is line noise over the USB port.
Another thing to note is that using an AC powered USB hub fixes the USB power and makes it just like using AC. I'm using a Belkin 7 port with an AC adapter and it makes my USB DACs dead silent.
I'm amazed that I haven't read any recommendations for iBasso on this thread. The iBasso D4 and D10/D12 are among my absolute favorite DACs (have a used D10 on the way). The only one I've heard that I like better than the D10 is the Lavry DA11, which is way more expensive and less portable. The DA11 is my favorite DAC period though. (I've heard a couple of dozen DACs at meets and owned about 6 myself.)