What is the voltage of the Supernait 3 DIN input?

Greetings - Im attempting to have custom RCA to DIN cables made by my current cable provider.
He has asked for the input voltage of the CD DIN input connection. The source is a non Naim DAC with a Maximum Output : 2.0V 4MS single, 4.0 RMS balanced.

Umm, it’s on the Naim website.

Thank you!