In the datasheets from the NC400 and the SMPS1200 you can find all information you need. What exactly do you want to know, what you can not find?
SMPS 1200A100 has positive and negative driver outputs: J1.1 is VDr+ and J1.4 is VDr-. On the other hand NC 400 has only one driver input J7.11 which is specified as VDR. What does it mean positive or negative???
The Vdr input of the NC400 must be connected to the positive Vdr output of the SMPS1200. This, and more information about Vdr can be found in chapter 5.5 of the SMPS1200 (rev 01-05-2016). Hope it helps!
Thank you for this info. I downloaded an older version of the datasheet that does not have it.
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For those that missed it:
http://www.diyaudio.com/forums/class-d/300417-dual-nc400-smps1200.html#post5089023
http://www.diyaudio.com/forums/class-d/300417-dual-nc400-smps1200.html#post5089023
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