Cambridge Audio CXC Volume Control?

The XLR input is usually +6db over RCA? The CXC output is <75 Ohm the Schiit XLR output is 75 Ohm . I think the problem is the high output of the Node set to fixed I don't think you would have a problem with the CXC. Try another CDP if you have one around or could borrow. 

I got lucky the volume on mine would go down and lock instead of up. After I did a firmware update it was fine, wish I would have kept it . I think it was a great sounding amp stock. Of course as they get older they need new parts might as well improve it. 

Have no idea it's hard to find a lot of specs on the Node2i. When I had the problem with a NAD I only had to reduce the volume about 5db not 15db that does seem a lot. 

I think it's a gain problem. I had a NAD C658 I set to fixed that ran into an integrated McIntosh and had the same problem. When I reduced the volume on the NAD sounded fine. I returned the NAD got annoying adjusting two volumes. A question not related have you ever had the Anthem volume ramp where it locked and you had to unplug it to get control? It was a problem on certain units which needed a firmware update.