[Tacoboy]

I want to be able to run a digital optical cablefrom my Motorola (Comcast) DVR (Dolby Digital 5.1) to some (headphone) amplifier, that will then output a Dolby Headphone 5.1 to my Beyerdynamic DT-770 Pro 250-Ohm headphones.
Cheaper is OK.

 

[BournePerfect]

Amps don't decode DH, dacs do. Look at TB DSS, Astro Mixamp, or some Harman Kardon and Marantz receivers with DH built in.
 
-Daniel