Have you tried plugging IEMs into an Asgard. There's a definite buzzing. There's also a VERY faint buzz when I plug in my ultrasone pro 900s ... It's barely audible but it's there.
I was told by Jason that the Asgard was not designed for IEMs, thus the buzz. And I guess because I heard the buzz with the IEMs, I was looking for it in my headphones. Only heard the buzz w the ultrasones. No buzz in the LCD-2s or DT990.
I guess I would have to agree. It would never occur to me to plug IEMs into the Asgard. Just doesn't make any sense. I have two pair of Ultrasones and they are perfectly silent with my Asgard.