I currently have Audinst HUD mini dac/amp. it drives low impedence headphones like hd518 well. As its a USB powered device without a wall plug, I believe its not a very powerful amp. Maybe something like FiioE10.
I plan to upgrade to HD650 or perhaps AKG Q701. I understand HD650 needs lots of power, and HUD mini will not bring it to its full potential.
But will I hear an upgrade with 650 over HD518 or will it sound even worse with mini? I plan to pick a dedicated amp like schiit vali but that has to wait a few months.
Also if someone has heard all HD518, HD650, AKG Q701, can you tell which is more transparent with least grain?
I enjoy sound sig of 518 a lot but I also want to try different signatures. is Q701 mellow and dark or bright and thin sounding?
Thanks in advance.