I received a faulty E10 today.
The volume pot doesn't work properly. When you plug it in sound comes straight out of it at 0 on the volume control, this continues until you turn it past 2 then it starts to perform normally. When turning the volume back down it does the same thing and continues to put out sound. After trying another USB cable I then noticed the amps input mini usb port is also loose and effects the sound if wiggled lightly. I have sent it back to be checked and replaced which I had to pay for.
This is unfortunate, as I already had one in perfect working order and sold it. This was a repurchase.
If yours is a reversion than you how you could notice that there has an sound improvement on old Fiio E10s? Do you have two Fiio E10? Is it better than the old version? I find out my Fiio E10 is fine as a DAC but the ampli function is just normal. My Fiio E10 can drive HD598 at decent volume but the smooth, mellow of HD598 are the parts that Fiio E10 can not bring it out. Maybe that is why I am saving money and looking for a new separate AMP.
Even if it is reversion, it is most likely just using a new brand of headphone jack (FiiO already talks about replacing the old jack with a different brand a few months back). It won't really affect the sound in that case,