By non-portable, I mean you actually need to use D3 with an USB power supply of some sort since D3 doesn't have any internal power supply (battery). Seems to me that you are going the long way to solve a simple problem, which the effort might out-weight the result. Anyway, good luck to your experiment.
Anyway, this thread is meant to be about the sound of two different OPAMPs, not about how portable the Fiio D3 is or whatever. Actually, let me put it this way. What if I were considering another amp such as the iBasso D-Zero with its AD8656? My current CMoy has been fried, so I'm going to have to get another. Along the way it doesn't hurt to investigate if I can find ANYTHING that even remotely approaches what I had with this. Most are much too expensive (too bad, I saw that JDS Labs has a "C421" with an option to get an AD8620, but it's $184 and I just don't think I can afford anything close to what it would cost even used right now) and really I can't afford even the D-Zero right now, but it doesn't hurt for me to at least consider it given how much easier it would be to deal with than a CMoy. (Especially given that it has a built in rechargeable lithium polymer battery and can also be powered via USB sources...) The thing is, the AD8620 in that CMoy "just fits" for me right now. It's just exactly what I needed and wanted. (Or more accurately was since the CMoy is now fried.) I don't want something that's just good, but something that suits me like that AD8620 did.
Edited by Nazo - 6/4/12 at 6:52pm