Compared the HD 620S on a FiiO K7 with the Sivga Oriole, FiiO FT1 Pro and Truthear Hexa on electronica and instrumental tracks, and finds it less immersive: the sound sits in front rather than around them.
“And HD620 sounds a bit less surrounding, like the sound comes more from in front of me than from all sides, the immersion is different, worse, when I change headphones immediatelly and have clear comparison.”