you make a confusion ..
I don't understand.
Since you're using Bit-perfect through Digital output (optical/coax), your prelude just transformed into transport to other external DAC, what's the point changing opamps (eg. change to OPA627), since the DAC chip inside Prelude it self isn't used when prelude in transport mode? How this opamps affect the transport output quality?
no - no - not a "transport" - the bitrate of surce - is not upsampled - or resampled to ex: 48khz is left like it is
the dac is use in both case
dac = digital to analog converter - is a device for converting a digital code to an analog signal .
this is valid just in analog output
in digital output - is no difference - in case of prelude .
"like" asioAudio Stream Input/Output - Wikipedia, the free encyclopedia