If the NUC has Toslink optical out that Rock can use (or a USB to Toslink converter) you should be good to go. Otherwise Airplay (If your Phantoms support it, max 16/48 AFAIK) or wait for RAAT. Many use a Raspberry Pi and a HiFiBerry Digi + PRO for this, however. With Ropieee you'd have network RAAT streaming and Toslink to Phantoms.
*
Devialetless!
Roon or LMS/brutefir/DietPi_x86_64
piCorePlayer/ISORegen/HeadStreamer/Yamaha HP-1
250 Pro CI, MicroRendu, Mutec MC-3+USB
Devialetless!
Roon or LMS/brutefir/DietPi_x86_64
piCorePlayer/ISORegen/HeadStreamer/Yamaha HP-1
250 Pro CI, MicroRendu, Mutec MC-3+USB

