After a considerable amount of listening to my HE-500 with the Lyr. Everything makes sense now why so many people love this tube amp so much. It's warm and might be a bit of a concern for warm and dark headphones but it has extremely good synergy with the Hifiman. With the velour pads, this amp delivers more bass impact than the pleathers with a portable amp (like the HP-P1). Not only it retains the airiness, the speed and detail, imaging is much improved, bass tightness and detail has greatly improved, treble is much more natural and mids are still chunky and wonderful and instrument separation is more coherent. It handles with no sweat complex passages.
I consider the Lyr as an extremely good purchase and worth every single penny.
The only downside, it runs quite warm and there is some noise with high sensitivity headphones.