I indeed compared those devices at the same volume. Otherwise an objective comparision wasn‘t possible I thought. So how would you recommend me to compare the devices and in which cases can I hear the benefits.

Hi! I purchased the xdp 300r to pair it with my campfire andromeda s and I am now comparing the sound quality between my devices. But I can’t hear a difference between the xdp 300r, my Samsung galaxy s7edge and my iPad mini 4. What could be the reason for that? Are my ears simply not sensible...