Consider buying Crown DCi 4x600N and 4x1250N for my 3xM2 DIY and subs.

But I read the M2 preset are looked!?

Does this mean that I can't do any adjustments With the DSP at all? And do it also mean that all 4xDSP settings are looked so I can't use DCI1250N for 1xM2 and 2xsubs?