I fail to see how a receiver that mentions Dolby Headphone, would be anything less than the actual Dolby Headphone. DH is just the process that takes a Dolby Digital/Pro Logic signal and converts it for headphones.
If the signal being being sent to the receiver is Dolby Digital, the receiver will convert it to Dolby headphone. It's the same exact processing that the Mixamp/DSS/AX720/etc do, just built into the receiver. In fact the receiver will probably have more than just one standardized setting found on these amps.
Obviously, a Dolby Digital signal can only be sent via optical, digital coaxial, or HDMI.
Or am I not understanding what you're trying to say?
Edited by Mad Lust Envy - 7/1/12 at 3:09pm