I tried and killed the poor thing while prying out the old opamp --- soldering pads are gone and I'm not sure where they led (no microscope at hand). should have followed the advice to just clip the pins and solder over it. Or should just have left it alone. Maybe I'll try to rig the opamp using...

Well, as noted in the thread I linked to initially, this does not seem to be a fake product. The FiiO guy did not say anything about the bad audio quality, so I have to assume that this is indeed a design fault on their part:-/ But I can assure that the current model, the "D03K Taishan" sounds...

Yes, D03K "Taishan" is the, as to my knowledge, third incarnation of the D3 design. As noted in the linked thread, the second version has gold-plated RCA connectors and it is very obvious once you open the case (just some screws on either side), comparing the population of the board.   For...

I'm not a sensible person ... so I bought a D03K, not willing to believe that FiiO really meant the changes it did in the second version.   And yes: This one's rather nice. Frequency response is very flat, no comparison to that muffler that was my D3! But some folks might be surprised that...

I bought a D3 recently and I can confirm the observations from this post (which is bit off-topic in the thread there):   http://www.head-fi.org/t/616077/dont-buy-any-fiio-product-from-sainstore-on-amazon-and-how-to-distinguish-a-genuine-fiio-e6-from-a-fake-one/135#post_8528808   Mine is...