“Is the source the CD transport or the dac.”
I would view the transport as the source like a turntable ,cartridge tonearm to phono stage ,preamp / transport, server ,streamer cable to dac to preamp for the volume control or not .
As for digital wire for me it’s always a long boring pain in the arase listening for the best suited for my components and currently I find a borrowed Sotm 75 ohm BNC cable with Empirical Audio RCA adapters a stand out well liked length of wire between my server and dac .
I would view the transport as the source like a turntable ,cartridge tonearm to phono stage ,preamp / transport, server ,streamer cable to dac to preamp for the volume control or not .
As for digital wire for me it’s always a long boring pain in the arase listening for the best suited for my components and currently I find a borrowed Sotm 75 ohm BNC cable with Empirical Audio RCA adapters a stand out well liked length of wire between my server and dac .