Plug & Play work with Windows 7 without any problems as far all my FiiO products. The FiiO E10K is the first time no longer equipped with a chip from Wolfson, but with a chip from Texas Instruments. It sounds, therefore, quite different from the known to me FiiO products. Clarity and sophistication are for a DAC this price range certainly good, even impressive. His stage is pretty small. With off bass boost the bass seem to me to be lowered, the sound is rather cold and very sterile. With only the bass boost (the bass increased by 3dB) it may sound subjectively better, but it is then too bassy. The bass boost is of course at the expense of midrange clarity.
Price / power of this DAC is fine, but in my opinion not as good as in other FiiO products. A comparison with the predecessor (E10) I can not draw, but the sound of the E07K (DAC and headphone amplifier with integrated battery) and the mobile Lossless player X3 I think better than the E10K. You sound warmer, spatial, just sort of coherent. I therefore maintain my E07K to the notebook and to be able to listen to decent music in the future. The FiiO E10K was contrast to my first product return ever on Amazon. Thanks to Amazon or the FiiO shop for easy withdrawal.
My conclusion: to operate closed-back headphones in the price range up to 200 euros the E10K is sufficient because this anyway offer only limited stage and usually do not have a flat frequency response. For most (probably all) onboard sound cards in PCs, laptops and tablets, he will also represent a significant step forward. For audiophile headphones in the price range over 200 euros I find the E10K contrast, hardly suitable.
Addendum: After I now iBasso the D-Zero MK2've bought and I'm thrilled, I can wholeheartedly recommend this as an alternative.
