Burson themselves state about the Conductor-
"since the introduction of the HA-160D in 2010, new headphones had flooded the market. We wanted a new headphone amp that can drive them all including the low-efficiency planarmagnetics"
Here - http://www.6moons.com/audioreviews/burson10/2.html
The 160D outputs .85 watt I believe, which doesn't really cut it for orthodynamics. In the Audeze manual, they recommend an amp at least 1 watt of power and more is even better.
Edited by Mediahound - 11/18/12 at 10:28pm