UnitiServe and HDX do playback 24-bit/192kHz to the SPDIF connected devices like a DAC, but do not stream 24-bit/192kHz over UPnP. UPnP is limited to 96kHz
Ahhh, good news !! Thanks Aleg.
Now im still interested !!
I know the UnitiServe has to be connected to a DAC (eg: Naim Dac); but can the HDX still play 192kHz files using its internal DAC, then sending it to the pre-amp ??