John O. can you please send me a PM with details/cost of your I2S cable builder, in case they could make me one?
The NSD upgrade I2S cable is EUR1050 after discount!
Rosgr63 I am also using the NSD transport. The biggest cable improvement came for going from the stock CAT5 network cable provided with the NSD pair to a DIY silver cable. The NSD set-up uses a common ground, so only 5 connections are made. The cable is easy to make:
28 ga. soft annealed silver (6N)
26 ga. teflon tubing
Two RJ45 plugs
RJ45 crimping tool (Radio Shack or other)
Techflex & heat shrink to finish.
I add braided copper shield to mine (I had the parts and makes the cable more durable). My finished cable is 1 meter in length.
Depending on where you source the parts, the whole thing can be put together for less than $75 and 1-2 hours of time.
Later, I upgraded the connectors to high grade 5 pin DIN and bypassed the RJ 45 - Note: this added significant cost & had least impact on sonics, but I like the idea of a more solid connection.
The improvement this cable made in my system was clearly audible - IMHO, YMMV, etc,etc.