I think it does need some running in. I didn't honestly think that a "solid state" device would need a run in period, but I have heard a huge improvement in soundstage, separation and clarity after a few days usage.
As a USB DAC I find the N3 capable, but it sounds better as a stand alone dap. Not sure how that works but hey, it still sounds better than the built in laptop soundcard!
OK, I'll make this my last feedback tonight, its 2:50am already and my efficient is going down hill.
When you read my suggestion on
burn in your DAP, you probably think I was way over my head. Indeed I was taking a big risk on flamed discussion at that time, I am glad that we didn't run into anything disaster and now we have several N3 users appreciated the benefit of a short burn-in period.
If you are interested in this topic, maybe you can check out what
professor55 has said in comparison of
250 hours i5 vs brand new i5. Should be an interesting read when you have experience something similar.
Now if I tells you that the USB cable between your computer and N3 might contributed to the audio performance, will you think I am crazy? The USB connectors have integrated Power Management function (i.e., Charging) and data transmission function into a confined area. The regular USB cables has at least four wires bundled together, two for data and two for power. When you connect your PC to a desktop DAC via a USB connection, only the two wire designated for data transmission will be active, you can almost assume the two wires designated for power/charging will be idled because the desktop DAC will not rely on the power supplied by the computer. At situation like this, we can have peace of mind that any decent USB cable should be adequate for the purpose.
However when you connect your computer to a Cayin N3, the computer will charge the N3 battery while functioning as DAC. In other word, all four wires are active, and the 0101 bitstream are transmitting right alongside a 5V power line from the computer to the N3. This is hardly an ideal case for data transmission, and we are not surprised noise and power-related interference will enter the data transmission wire of the USB connection. In other word, a USB cable with better internal shielding "might" sound better then a low-cost USB cable without proper internal shielding.
You don't have to take my word, and I worded this as a hypothetical explanation in order to avoid flamed discussion, so please don't quote me for this either. I am not selling any USB cable so I won't be financially rewarded even when you believed in what I just said.