I am currently in possession of the DN-19 and reviewing it as we speak.
Expect a review in this few coming weeks!
Bass is indeed enhanced A LOT with the screw-able damper off, pointing to "bassy"
With the damper on however, it gets much more balanced, but the bass still has a lot of punch.
One thing I notice is that Micro Details is very easy to catch with this IEM.
That's all for now!