I belive there are 2 ways to connect my naim uniti2 as a preamp to naim NAP250DR first is 2 male phono out to 3 pinXLR into my naim DR 250DR and the other is 5 pin out of my naim uniti2 into my naim NAP250DR. Which is the best please I believe I have to put my uniti2 into preamp mode first ,other wise blue flash / bang and very expensive mess lol
It’s the 4 pin DIN output on your Uniti that you should be using (not 5 pin as found on the DIN inputs.) The standard Naim cable provided with the 250 will work for this.
The pre out connection on the Uniti does not need to be turned on, but if you are no longer using its built in power amp you can turn that off using the settings on the front panel display.
It’s my understanding that there is an option under the ‘speakers’ menu, see page 11 of the manual. Having looked there I cannot see an option to switch off the power amp, so I may be wrong. Go into that menu and see if the option is there. It maybe that you cannot switch the power amp off.