It pairs wonderfully with the ODAC, so I'm sure the DragonFly will do just fine. Heck, it sounds frighteningly good with my iPhone! As long as the DAc is decent, this thing will pump your HE-500 full of clean current that will make your eyes pop (in a good way).
In order to hear why the HE-500 sounds mindbogglingly good with this amp, you'll need to run it off the amp's speaker taps (not the headphone out). I had my stock, silver HE-500 cable re-terminated to banana plugs. The cable plus into the amps speaker posts on the back.. and the sound is GLORIOUS.
Edited by FlySweep - 8/12/12 at 11:21pm