I’m posting due to my confusion on BNC-BNC connection. I can usually find what i need to know on the forum but i have found and been give conflicting information. I have all Naim units CD5XS & ND5XS2 as transports only connected by Mark Grant HDX BNC-BNC to a Naim Ndac. This is connected to a Nait XS2 amp with an Analog Chord Signature X 5-pin DIN-DIN. My understanding was that the CD supply’s the signal earth so everything else should be set to float . Having received advice to set the streamer to default ( CD being earthed as default) & the Ndac to float as the Ndac isolates the earth signal per channel. Also reading on the forum that the digital BNC cable does not carry the signal earth due to not being galvanacally connected i am seriously confused. If someone can clarify what the setup should be i would be greatly appreciative.
The nDAC would be set to Chassis and the ND5 and CD5 to float. Since the only analogue signal connecting to the amp comes from the nDAC, that should be your signal ground. That is in fact your true source of the analogue signal.
As you mentioned, the digital inputs are galvanically isolated on the Naim DAC via pulse transformers. The Naim DAC will be set to chassis on the Signal Ground switch.
As you’re using them both as transports, the settings on the ND5 and CD5 won’t affect this so no need to worry about no ground lift switch on the CD5.