TOPIC:

I'm sort of supposing the DSP should be able to do this - but am totally unfamiliar with how mini dsp works, so looking for confirmation:

If I got the balanced version of the flex, would the mini DSP be able to apply a 2x gain to the analogue input for the case of source being unbalanced via RCA to TRS cable.

And then subsequently perform the room correction on the amped up signal?

Thanks.

The room correction is done in the digital domain.  No worries about matching analog levels (short of clipping the ADC, but that won't happen feeding unbalanced to a balanced input).

@ tonycollinet

If you're using the Flex running Dirac Live, it doesn't have gain control on the input though so no you can't boost your input signal first. 
if you've got an unbalanced source, the flex unbalanced would be the easiest way I think. 

devteam