FIIO FD15 - balanced natural sound

I didn't expect too much coming into this, and was met with a very natural and rich sound. I was surprised and really liked what I heard. What it does so well is sounding natural without being thin or thick. Enough warmth to be fun for my music, with a good and present midrange that is so often lacking on many sets.
There is also the amount of texture in the micro details, I believe the use of an extra large 13.8mm driver is the reason. The magnet is also having good control over it so it doesn't sound loose, I think this is a thing more should aim for forward using a larger driver with good control.