Master/slave link

[f1eng]

Interesting. I used rca to AES with my D-Premiers but didn't even try it with the 800 since I was pleased to use the extra inputs which disappear if not selecting rca to rca.
Since the main SQ difference I have noticed between a pair of D-Premiers and the 800 is that the 800 has less stereo depth than the dual monos I had been intending to go back for a trial but I am concerned about the fact that the configurator seems to no longer work properly for dual mono amps.

You can try a new configuration and always keep a back up of the current configuration files that are functioning properly. If the new configuration messes things up, you can then revert to the backed up files

Quite so, that is what I have done before but trying something which may not work is a waste of listening time
I probably won't bother until I know the configurator is mended.