Funny you should mention that. I have an AK380 here and I find it unlistenable after having used the Hugo 2. I still use my Utopias with the Hugo 2 when I'm away from my main system. I think you have to put my comments in context: I've only experienced the Utopias on two amps which I felt really got the most out of them, and the other was the now never to be produced Liquid Tungsten. Things are really at the point now that $2k DACs and $4k headphones are so incredibly capable that you really have to go pretty crazy far to get the most out of either of them.