If from Audio Jade on eBay, they are honest and call the chips used. The listing says new, but they specify that the adapters are what's new, lol.
ADA4610 is bad ass. Deep sound stage with razor-sharp imaging, lively sound, incredibly clean, very clear and full treble. Note attack is rather sharp, just shy of being a bit too much for my tastes but lends itself well to percussion instruments. Very neutral and mercilessly revealing, just the way I prefer. =]
Why did you have to mention ADA4610, now I have to make another impulse buy.
It looks like the ADA4610 do not come in DIP-8, so time to try my hand at soldering.
Anyway, I did order from Audio Jade.